Climate and average weather in Tromsdalen
In Tromsdalen, the summers are mild, showery, and mostly cloudy and the winters are very cold, snowy, and mostly cloudy.
Over the course of the year, the temperature in Tromsdalen typically varies from -10°C to 15°C, and is rarely below -22°C or above 22°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best time of year to visit Tromsdalen for warm-weather activities is from early July to late August.
- Hottest
- Jul
- 15°
- Coldest
- Jan
- -10°
- Wettest
- Oct
- 128 mm
- Driest
- Apr
- 85 mm
- Rain / yr
- 1208 mm
- 184 wet days
- Daylight
- 0.0–24.0 h
- shortest–longest
- Elevation
- 141 m
- 69.7°N
- Clearest
- Apr
- 70% cloud
Tromsdalen is settlement in Tromsø Municipality, Norway.
- Density
- 3,651/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Tromsdalen weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early July to late August.
Temperature through the year
Daily average highs and lows in Tromsdalen, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.5 months, from June 3 to September 16, with daily high temperatures above 10°C. The hottest month of the year in Tromsdalen is July, with an average high of 15°C and low of 9°C.
The cool season lasts 3.4 months, from December 1 to March 14, with daily high temperatures below -1°C. The coldest month of the year in Tromsdalen is January, with an average low of -10°C and high of -4°C.
Days typically run about 5°C warmer than nights year-round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | -4 | -4 | -1 | 3 | 8 | 12 | 15 | 14 | 10 | 4 | 0 | -2 |
| Avg low (°C) | -10 | -10 | -7 | -3 | 2 | 6 | 9 | 9 | 5 | 0 | -5 | -8 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | -4 | -10 |
| Feb | -4 | -10 |
| Mar | -1 | -7 |
| Apr | 3 | -3 |
| May | 8 | 2 |
| Jun | 12 | 6 |
| Jul | 15 | 9 |
| Aug | 14 | 9 |
| Sep | 10 | 5 |
| Oct | 4 | 0 |
| Nov | 0 | -5 |
| Dec | -2 | -8 |
How hot and cold Tromsdalen really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the coldest nights, wind chill pulls the feels-like down to about -16°C (around January 29), with roughly 227 freezing days a year (feels-like at or below 0°C) — 124 of them bitterly cold — worst in January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | -4 | -4 | -1 | 3 | 8 | 12 | 15 | 14 | 10 | 4 | 0 | -2 |
| Air high (°C) | -4 | -4 | -1 | 3 | 8 | 12 | 15 | 14 | 10 | 4 | 0 | -2 |
| Feels-like low (°C) | -15 | -15 | -12 | -6 | 0 | 5 | 8 | 7 | 3 | -3 | -9 | -13 |
| Air low (°C) | -10 | -10 | -7 | -3 | 2 | 6 | 9 | 9 | 5 | 0 | -5 | -8 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | -4 | -4 | -15 | -10 |
| Feb | -4 | -4 | -15 | -10 |
| Mar | -1 | -1 | -12 | -7 |
| Apr | 3 | 3 | -6 | -3 |
| May | 8 | 8 | 0 | 2 |
| Jun | 12 | 12 | 5 | 6 |
| Jul | 15 | 15 | 8 | 9 |
| Aug | 14 | 14 | 7 | 9 |
| Sep | 10 | 10 | 3 | 5 |
| Oct | 4 | 4 | -3 | 0 |
| Nov | 0 | 0 | -9 | -5 |
| Dec | -2 | -2 | -13 | -8 |
Average hourly temperature in Tromsdalen
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on July afternoons, near 15°C, and coldest before dawn in January, near -10°C.
Tromsdalen weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -4° / -10° | 105 | 14.7 | 15.2 | 0.8 | 0.0 |
| Feb | -4° / -10° | 91 | 14.1 | 14.6 | 6.4 | 0.0 |
| Mar | -1° / -7° | 102 | 15.6 | 16.3 | 10.9 | 0.0 |
| Apr | 3° / -3° | 85 | 14.6 | 12.7 | 15.5 | 0.0 |
| May | 8° / 2° | 91 | 16.1 | 6.9 | 21.1 | 1.1 |
| Jun | 12° / 6° | 93 | 15.2 | 0.6 | 24 | 2.6 |
| Jul | 15° / 9° | 90 | 14.2 | 0 | 23.3 | 4.0 |
| Aug | 14° / 9° | 102 | 15.3 | 0 | 17.6 | 3.6 |
| Sep | 10° / 5° | 125 | 17.2 | 1.3 | 12.9 | 2.0 |
| Oct | 4° / 0° | 128 | 16.9 | 8.8 | 8.4 | 0.2 |
| Nov | -0° / -5° | 95 | 15 | 12.2 | 2.7 | 0.0 |
| Dec | -3° / -8° | 103 | 15.4 | 14.9 | 0 | 0.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Tromsdalen gets about 1208 mm of precipitation a year. On a typical day the chance of rain is very wet, but that rises and falls sharply with the seasons.
The wetter season lasts 2.6 months, from around Aug 23 to Nov 8, peaking in October at about 57% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 28.
October is the wettest month by volume, with 128 mm over about 17 wet days; April is the driest, with 85 mm. Some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 48 | 49 | 50 | 50 | 52 | 50 | 47 | 49 | 56 | 55 | 50 | 49 |
| Rain days | 15 | 14 | 16 | 15 | 16 | 15 | 14 | 15 | 17 | 17 | 15 | 15 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 48 | 15 |
| Feb | 49 | 14 |
| Mar | 50 | 16 |
| Apr | 50 | 15 |
| May | 52 | 16 |
| Jun | 50 | 15 |
| Jul | 47 | 14 |
| Aug | 49 | 15 |
| Sep | 56 | 17 |
| Oct | 55 | 17 |
| Nov | 50 | 15 |
| Dec | 49 | 15 |
Monthly rainfall
Over a full year, Tromsdalen collects about 1208 mm of rain across 184 wet days — roughly 101 mm in an average month.
It doesn’t fall evenly. October is the wettest month with 128 mm, while April is the driest at just 85 mm. The three wettest months alone bring about 30% of the year’s total, and some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 105 | 91 | 102 | 85 | 91 | 93 | 90 | 102 | 125 | 128 | 95 | 103 |
| Rain days | 15 | 14 | 16 | 15 | 16 | 15 | 14 | 15 | 17 | 17 | 15 | 15 |
| Snow days | 15 | 15 | 16 | 13 | 7 | 1 | 0 | 0 | 1 | 9 | 12 | 15 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 105 | 15 | 15 |
| Feb | 91 | 14 | 15 |
| Mar | 102 | 16 | 16 |
| Apr | 85 | 15 | 13 |
| May | 91 | 16 | 7 |
| Jun | 93 | 15 | 1 |
| Jul | 90 | 14 | 0 |
| Aug | 102 | 15 | 0 |
| Sep | 125 | 17 | 1 |
| Oct | 128 | 17 | 9 |
| Nov | 95 | 15 | 12 |
| Dec | 103 | 15 | 15 |
Snow in Tromsdalen
Average snowy days through the year, the snow-season span, and estimated snowfall — for ski trips and the perennial 'will there be snow at Christmas?' question.
Tromsdalen averages about 104 snowy days a year. Snow season runs roughly Sep 11 to Jun 17 — about 9.2 months.
March is snowiest, with roughly 16 days of snow and an estimated 97 cm of snowfall. Over the year that adds up to an estimated 543 cm of snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow days | 15 | 15 | 16 | 13 | 7 | 1 | 0 | 0 | 1 | 9 | 12 | 15 |
| Snowfall (cm) | 83 | 93 | 97 | 63 | 24 | 1 | 0 | 0 | 4 | 48 | 57 | 74 |
| Snow days | Snowfall (cm) | |
|---|---|---|
| Jan | 15 | 83 |
| Feb | 15 | 93 |
| Mar | 16 | 97 |
| Apr | 13 | 63 |
| May | 7 | 24 |
| Jun | 1 | 1 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 1 | 4 |
| Oct | 9 | 48 |
| Nov | 12 | 57 |
| Dec | 15 | 74 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Tromsdalen, the average share of the sky covered by clouds shows mild seasonal variation over the course of the year.
The clearer part of the year begins around January 18 and lasts for 3.9 months, ending around May 15. The clearest month is April, when the sky is clear, mostly clear, or partly cloudy 29% of the time on average.
The cloudier part of the year begins around May 16 and lasts for 2.2 months, ending around July 20. The cloudiest month is June, when it is overcast or mostly cloudy 80% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 24 | 24 | 26 | 29 | 24 | 20 | 22 | 20 | 23 | 24 | 22 | 22 |
| Cloudier (%) | 76 | 76 | 74 | 71 | 76 | 80 | 78 | 80 | 77 | 76 | 78 | 78 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 24 | 76 |
| Feb | 24 | 76 |
| Mar | 26 | 74 |
| Apr | 29 | 71 |
| May | 24 | 76 |
| Jun | 20 | 80 |
| Jul | 22 | 78 |
| Aug | 20 | 80 |
| Sep | 23 | 77 |
| Oct | 24 | 76 |
| Nov | 22 | 78 |
| Dec | 22 | 78 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around May 24, brings about 24 hours of light; the shortest, around January 1, only 0 hours — a swing of roughly 24 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 0.8 | 6.4 | 10.9 | 15.5 | 21.1 | 24.0 | 23.3 | 17.6 | 12.9 | 8.4 | 2.7 | 0.0 |
| Sunrise (AM) | — | 8:43 | 6:25 | 3:59 | 1:16 | — | — | 3:01 | 5:13 | 7:16 | 10:05 | — |
| Sunset (PM) | — | 3:14 | 5:22 | 7:29 | 10:04 | — | — | 8:35 | 6:03 | 3:42 | 12:54 | — |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 0.8 | — | — |
| Feb | 6.4 | 8:43 | 3:14 |
| Mar | 10.9 | 6:25 | 5:22 |
| Apr | 15.5 | 3:59 | 7:29 |
| May | 21.1 | 1:16 | 10:04 |
| Jun | 24.0 | — | — |
| Jul | 23.3 | — | — |
| Aug | 17.6 | 3:01 | 8:35 |
| Sep | 12.9 | 5:13 | 6:03 |
| Oct | 8.4 | 7:16 | 3:42 |
| Nov | 2.7 | 10:05 | 12:54 |
| Dec | 0.0 | — | — |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Tromsdalen averages about 4 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 2 and 5 days.
The sunnier stretch runs 3.9 months, from around Jan 11 to May 9. The sunniest month is April, with roughly 5 sunny days (gloomy).
The greyest month is August, down near 3 sunny days — about 48% fewer than the April peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 4 | 4 | 5 | 5 | 4 | 3 | 4 | 3 | 4 | 4 | 4 | 4 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 4 | Gloomy |
| Feb | 4 | Gloomy |
| Mar | 5 | Gloomy |
| Apr | 5 | Gloomy |
| May | 4 | Gloomy |
| Jun | 3 | Gloomy |
| Jul | 4 | Gloomy |
| Aug | 3 | Gloomy |
| Sep | 4 | Gloomy |
| Oct | 4 | Gloomy |
| Nov | 4 | Gloomy |
| Dec | 4 | Gloomy |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In Tromsdalen, the air stays dry or comfortable essentially all year. Even in July, the muggiest month, it feels humid or worse only about 0% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 94 | 97 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 3 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 94 | 6 |
| Aug | 97 | 3 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 100 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Across the year, average wind speed in Tromsdalen is typically calm, near 9 km/h, and varies little with the seasons.
The windier part of the year lasts 4.7 months, from around Nov 10 to Apr 1. The windiest month is January, averaging about 11 km/h (calm).
The calmer part of the year runs from around Apr 2 to Nov 9, with August the calmest month at about 8 km/h.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 9 | 9 | 9 | 10 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 11 | calm |
| Feb | 10 | calm |
| Mar | 10 | calm |
| Apr | 9 | calm |
| May | 9 | calm |
| Jun | 9 | calm |
| Jul | 8 | calm |
| Aug | 8 | calm |
| Sep | 9 | calm |
| Oct | 9 | calm |
| Nov | 9 | calm |
| Dec | 10 | calm |
Best time to visit Tromsdalen
To characterize how pleasant the weather is in Tromsdalen throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid August, Tromsdalen is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Tromsdalen for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 0.0 | 0.0 | 0.0 | 0.0 | 1.1 | 2.6 | 3.9 | 3.5 | 2.0 | 0.2 | 0.0 | 0.0 |
| Rating | poor | poor | poor | poor | poor | poor | fair | fair | poor | poor | poor | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 0.0 | poor |
| Feb | 0.0 | poor |
| Mar | 0.0 | poor |
| Apr | 0.0 | poor |
| May | 1.1 | poor |
| Jun | 2.6 | poor |
| Jul | 3.9 | fair |
| Aug | 3.5 | fair |
| Sep | 2.0 | poor |
| Oct | 0.2 | poor |
| Nov | 0.0 | poor |
| Dec | 0.0 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Tromsdalen rarely gets warm enough to lift this score — no time of year really suits hot-weather activities here.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for Tromsdalen, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around July (highs near 15°C), the essentials are a warm layer and rain gear. In the cold season around January (highs near -4°C), pack a warm layer, a heavy coat and rain gear.
In July, Tromsdalen sees daytime highs around 15°C and nights near 9°C. Pack rain gear. Worth having: a warm layer. About 14 days see rain.
Sea temperature near Tromsdalen
Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.
The sea at the nearest coast (about 29 km away) is warmest in August at about 11°C and coldest in March near 4°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 5 | 5 | 4 | 4 | 6 | 8 | 10 | 11 | 10 | 9 | 7 | 6 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 5 | Bracing |
| Feb | 5 | Bracing |
| Mar | 4 | Bracing |
| Apr | 4 | Bracing |
| May | 6 | Bracing |
| Jun | 8 | Bracing |
| Jul | 10 | Bracing |
| Aug | 11 | Bracing |
| Sep | 10 | Bracing |
| Oct | 9 | Bracing |
| Nov | 7 | Bracing |
| Dec | 6 | Bracing |
UV index (midday) in Tromsdalen by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in Tromsdalen peaks around July 15 at about 4 (moderate) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 2 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 0 | 0 | 1 | 2 | 3 | 3 | 4 | 3 | 1 | 0 | 0 | 0 |
| Level | Low | Low | Low | Low | Moderate | Moderate | Moderate | Moderate | Low | Low | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 0 | Low |
| Feb | 0 | Low |
| Mar | 1 | Low |
| Apr | 2 | Low |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 4 | Moderate |
| Aug | 3 | Moderate |
| Sep | 1 | Low |
| Oct | 0 | Low |
| Nov | 0 | Low |
| Dec | 0 | Low |
Average hourly UV index in Tromsdalen
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 4.5 hours a day reach index 3 (protection recommended). Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 0 | 0 | 0 | 0 | 0 | 3 | 4.5 | 0 | 0 | 0 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 0 | 0 |
| Apr | 0 | 0 |
| May | 0 | 0 |
| Jun | 3 | 0 |
| Jul | 4.5 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 0 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Growing season
The growing season in Tromsdalen typically lasts about 166 days, from around May 3 to October 15 — the span where a frost-free day is more likely than not. It is reliably frost-free from May 24 to September 25.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 9 | 9 | 11 | 25 | 76 | 99 | 100 | 100 | 95 | 52 | 21 | 14 |
| Frost nights | 31 | 28 | 31 | 30 | 22 | 0 | 0 | 0 | 4 | 31 | 30 | 31 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 9 | 31 |
| Feb | 9 | 28 |
| Mar | 11 | 31 |
| Apr | 25 | 30 |
| May | 76 | 22 |
| Jun | 99 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 95 | 4 |
| Oct | 52 | 31 |
| Nov | 21 | 30 |
| Dec | 14 | 31 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Tromsdalen banks about 112 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 0 | 0 | 0 | 3 | 66 | 43 | 0 | 0 | 0 | 0 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 0 |
| May | 0 |
| Jun | 3 |
| Jul | 66 |
| Aug | 43 |
| Sep | 0 |
| Oct | 0 |
| Nov | 0 |
| Dec | 0 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
Tromsdalen receives about 2.0 kWh/m² a day of solar energy on average — dim — with a clear seasonal swing between 0.0 and 4.8 kWh/m².
The brighter stretch of the year lasts 5.5 months, from around Mar 23 to Sep 5. The brightest month is June, averaging about 4.6 kWh/m² (bright).
The dimmest month is January, down near 0.0 kWh/m² — roughly 100% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 0.0 | 0.3 | 1.6 | 3.4 | 4.5 | 4.7 | 4.1 | 2.9 | 1.6 | 0.5 | 0.0 | 0.0 |
| Level | Dim | Dim | Dim | Moderate | Bright | Bright | Bright | Moderate | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 0.0 | Dim |
| Feb | 0.3 | Dim |
| Mar | 1.6 | Dim |
| Apr | 3.4 | Moderate |
| May | 4.5 | Bright |
| Jun | 4.7 | Bright |
| Jul | 4.1 | Bright |
| Aug | 2.9 | Moderate |
| Sep | 1.6 | Dim |
| Oct | 0.5 | Dim |
| Nov | 0.0 | Dim |
| Dec | 0.0 | Dim |
Where is Tromsdalen?
Tromsdalen sits at 69.7°N, 19.0°E, 141 m above sea level, in Norway. The nearest listed city is Tromso, 2.0 km away.
Topography around Tromsdalen
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tromsdalen.
Within 3 km, the terrain around Tromsdalen has large variations in elevation — a maximum elevation change of 649 m around an average of 203 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,225 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,831 m.
The land around Tromsdalen is covered by trees (34%) and water (22%) within 3 km, grassland (36%), water (25%) and trees (21%) within 16 km, and water (42%) and grassland (21%) within 80 km.
Norway travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 91% of US
- price level, 2025
- GDP per capita
- $94,594
- 2025
- Happiness
- 7.2 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 2.1
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 613
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tromsdalen (69.65°, 19.0167°, elevation 141 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).