Climate and average weather in Grand Canyon
In Grand Canyon, the summers are hot, fairly dry, and mostly clear and the winters are cold, snowy, and mostly clear.
Over the course of the year, the temperature in Grand Canyon typically varies from 25°F to 90°F, and is rarely below 13°F or above 97°F. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit Grand Canyon for warm-weather activities are from mid April to mid June and mid September to late October.
- Hottest
- Jul
- 90°
- Coldest
- Jan
- 25°
- Wettest
- Feb
- 1.5 in
- Driest
- Jun
- 0.1 in
- Rain / yr
- 10.6 in
- 51 wet days
- Daylight
- 9.5–14.5 h
- shortest–longest
- Elevation
- 0 ft
- 36.1°N
- Clearest
- Jun
- 23% cloud
Grand Canyon is human settlement in Coconino County, Arizona, United States of America.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Grand Canyon 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 mid April to mid June.
Temperature through the year
Daily average highs and lows in Grand Canyon, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 4.0 months, from May 26 to September 23, with daily high temperatures above 79°F. The hottest month of the year in Grand Canyon is July, with an average high of 90°F and low of 65°F.
The cool season lasts 3.3 months, from November 25 to March 3, with daily high temperatures below 53°F. The coldest month of the year in Grand Canyon is January, with an average low of 25°F and high of 46°F.
Days typically run about 24°F warmer than nights, with the widest day–night swing (around 29°F) in June.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 46 | 50 | 58 | 65 | 76 | 87 | 90 | 88 | 81 | 69 | 57 | 46 |
| Avg low (°F) | 25 | 29 | 34 | 40 | 49 | 58 | 65 | 63 | 56 | 44 | 33 | 26 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| Jan | 46 | 25 |
| Feb | 50 | 29 |
| Mar | 58 | 34 |
| Apr | 65 | 40 |
| May | 76 | 49 |
| Jun | 87 | 58 |
| Jul | 90 | 65 |
| Aug | 88 | 63 |
| Sep | 81 | 56 |
| Oct | 69 | 44 |
| Nov | 57 | 33 |
| Dec | 46 | 26 |
How hot and cold Grand Canyon 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 hottest afternoons, once humidity is folded in, Grand Canyon feels like about 91°F (around June 30). About 35 days a year carry some heat stress, peaking in June.
On the coldest nights, wind chill pulls the feels-like down to about 18°F (around December 27), with roughly 149 freezing days a year (feels-like at or below 32°F), worst in December.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°F) | 46 | 50 | 58 | 65 | 76 | 87 | 90 | 88 | 81 | 69 | 57 | 46 |
| Air high (°F) | 46 | 50 | 58 | 65 | 76 | 87 | 90 | 88 | 81 | 69 | 57 | 46 |
| Feels-like low (°F) | 20 | 23 | 29 | 35 | 47 | 58 | 65 | 63 | 56 | 41 | 29 | 20 |
| Air low (°F) | 25 | 29 | 34 | 40 | 49 | 58 | 65 | 63 | 56 | 44 | 33 | 26 |
| Feels-like high (°F) | Air high (°F) | Feels-like low (°F) | Air low (°F) | |
|---|---|---|---|---|
| Jan | 46 | 46 | 20 | 25 |
| Feb | 50 | 50 | 23 | 29 |
| Mar | 58 | 58 | 29 | 34 |
| Apr | 65 | 65 | 35 | 40 |
| May | 76 | 76 | 47 | 49 |
| Jun | 87 | 87 | 58 | 58 |
| Jul | 90 | 90 | 65 | 65 |
| Aug | 88 | 88 | 63 | 63 |
| Sep | 81 | 81 | 56 | 56 |
| Oct | 69 | 69 | 41 | 44 |
| Nov | 57 | 57 | 29 | 33 |
| Dec | 46 | 46 | 20 | 26 |
Average hourly temperature in Grand Canyon
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 90°F, and coldest before dawn in January, near 25°F.
Grand Canyon weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 46° / 25° | 1.4 | 5.3 | 3.4 | 9.8 | 1.3 |
| Feb | 50° / 29° | 1.5 | 6.5 | 3.8 | 10.6 | 2.5 |
| Mar | 58° / 34° | 1.1 | 5.2 | 1.9 | 11.7 | 5.0 |
| Apr | 65° / 40° | 0.8 | 4.1 | 1.2 | 12.9 | 7.1 |
| May | 76° / 49° | 0.4 | 2.2 | 0.1 | 13.9 | 8.5 |
| Jun | 87° / 58° | 0.1 | 0.9 | 0 | 14.4 | 6.2 |
| Jul | 90° / 65° | 0.8 | 5.5 | 0 | 14.2 | 4.4 |
| Aug | 88° / 63° | 0.8 | 5.1 | 0 | 13.4 | 5.2 |
| Sep | 81° / 56° | 0.8 | 3.9 | 0 | 12.2 | 7.7 |
| Oct | 69° / 44° | 0.8 | 3.5 | 0.3 | 11.1 | 8.0 |
| Nov | 57° / 33° | 0.8 | 3.6 | 1.2 | 10.1 | 4.9 |
| Dec | 46° / 26° | 1.2 | 5.3 | 3.6 | 9.6 | 1.4 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Grand Canyon gets about 10.6 in of precipitation a year. On a typical day the chance of rain is mostly dry, but that rises and falls sharply with the seasons.
The wetter season lasts 4.5 months, from around Nov 29 to Apr 13, peaking in February at about 26% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jun 18.
February is the wettest month by volume, with 1.5 in over about 7 wet days; June is the driest, with 0.1 in. 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 (%) | 17 | 22 | 18 | 13 | 7 | 4 | 17 | 17 | 13 | 11 | 12 | 17 |
| Rain days | 5 | 7 | 5 | 4 | 2 | 1 | 6 | 5 | 4 | 4 | 4 | 5 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 17 | 5 |
| Feb | 22 | 7 |
| Mar | 18 | 5 |
| Apr | 13 | 4 |
| May | 7 | 2 |
| Jun | 4 | 1 |
| Jul | 17 | 6 |
| Aug | 17 | 5 |
| Sep | 13 | 4 |
| Oct | 11 | 4 |
| Nov | 12 | 4 |
| Dec | 17 | 5 |
Monthly rainfall
Over a full year, Grand Canyon collects about 10.6 in of rain across 51 wet days — roughly 0.9 in in an average month.
It doesn’t fall evenly. February is the wettest month with 1.5 in, while June is the driest at just 0.1 in. The three wettest months alone bring about 38% 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 (in) | 1.4 | 1.5 | 1.1 | 0.8 | 0.4 | 0.1 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 1.2 |
| Rain days | 5 | 7 | 5 | 4 | 2 | 1 | 6 | 5 | 4 | 4 | 4 | 5 |
| Snow days | 3 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
| Rainfall (in) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 1.4 | 5 | 3 |
| Feb | 1.5 | 7 | 4 |
| Mar | 1.1 | 5 | 2 |
| Apr | 0.8 | 4 | 1 |
| May | 0.4 | 2 | 0 |
| Jun | 0.1 | 1 | 0 |
| Jul | 0.8 | 6 | 0 |
| Aug | 0.8 | 5 | 0 |
| Sep | 0.8 | 4 | 0 |
| Oct | 0.8 | 4 | 0 |
| Nov | 0.8 | 4 | 1 |
| Dec | 1.2 | 5 | 4 |
Snow in Grand Canyon
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.
Grand Canyon averages about 15 snowy days a year. Snow season runs roughly Oct 29 to Apr 25 — about 5.9 months.
February is snowiest, with roughly 4 days of snow and an estimated 7 in of snowfall. Over the year that adds up to an estimated 27 in of snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Snow days | 3 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
| Snowfall (in) | 7 | 7 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 6 |
| Snow days | Snowfall (in) | |
|---|---|---|
| Jan | 3 | 7 |
| Feb | 4 | 7 |
| Mar | 2 | 4 |
| Apr | 1 | 2 |
| May | 0 | 0 |
| Jun | 0 | 0 |
| Jul | 0 | 0 |
| Aug | 0 | 0 |
| Sep | 0 | 0 |
| Oct | 0 | 0 |
| Nov | 1 | 2 |
| Dec | 4 | 6 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Grand Canyon, the average share of the sky covered by clouds shows moderate seasonal variation over the course of the year.
The clearer part of the year begins around April 27 and lasts for 2.6 months, ending around July 15. The clearest month is June, when the sky is clear, mostly clear, or partly cloudy 89% of the time on average.
The cloudier part of the year begins around November 20 and lasts for 5.2 months, ending around April 26. The cloudiest month is February, when it is overcast or mostly cloudy 38% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 65 | 62 | 66 | 71 | 79 | 89 | 76 | 81 | 87 | 82 | 75 | 65 |
| Cloudier (%) | 35 | 38 | 34 | 29 | 21 | 11 | 24 | 19 | 13 | 18 | 25 | 35 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 65 | 35 |
| Feb | 62 | 38 |
| Mar | 66 | 34 |
| Apr | 71 | 29 |
| May | 79 | 21 |
| Jun | 89 | 11 |
| Jul | 76 | 24 |
| Aug | 81 | 19 |
| Sep | 87 | 13 |
| Oct | 82 | 18 |
| Nov | 75 | 25 |
| Dec | 65 | 35 |
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 June 20, brings about 14 h 30 min of light; the shortest, around December 20, only 9 h 30 min — a swing of roughly 5 hours.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.8 | 10.6 | 11.7 | 12.9 | 13.9 | 14.4 | 14.2 | 13.4 | 12.2 | 11.1 | 10.1 | 9.6 |
| Sunrise (AM) | 7:44 | 7:24 | 6:47 | 6:01 | 5:28 | 5:16 | 5:27 | 5:51 | 6:16 | 6:42 | 7:12 | 7:38 |
| Sunset (PM) | 5:32 | 6:02 | 6:30 | 6:56 | 7:22 | 7:42 | 7:41 | 7:14 | 6:30 | 5:46 | 5:15 | 5:12 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.8 | 7:44 | 5:32 |
| Feb | 10.6 | 7:24 | 6:02 |
| Mar | 11.7 | 6:47 | 6:30 |
| Apr | 12.9 | 6:01 | 6:56 |
| May | 13.9 | 5:28 | 7:22 |
| Jun | 14.4 | 5:16 | 7:42 |
| Jul | 14.2 | 5:27 | 7:41 |
| Aug | 13.4 | 5:51 | 7:14 |
| Sep | 12.2 | 6:16 | 6:30 |
| Oct | 11.1 | 6:42 | 5:46 |
| Nov | 10.1 | 7:12 | 5:15 |
| Dec | 9.6 | 7:38 | 5:12 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Grand Canyon averages about 18 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 12 and 23 days.
The sunnier stretch runs 3.5 months, from around Aug 13 to Nov 28. The sunniest month is September, with roughly 22 sunny days (bright).
The greyest month is February, down near 13 sunny days — about 38% fewer than the September peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 15 | 12 | 15 | 16 | 19 | 22 | 16 | 18 | 21 | 21 | 19 | 16 |
| Sky | Bright | Mixed | Mixed | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Sunny days | Sky | |
|---|---|---|
| Jan | 15 | Bright |
| Feb | 12 | Mixed |
| Mar | 15 | Mixed |
| Apr | 16 | Bright |
| May | 19 | Bright |
| Jun | 22 | Bright |
| Jul | 16 | Bright |
| Aug | 18 | Bright |
| Sep | 21 | Bright |
| Oct | 21 | Bright |
| Nov | 19 | Bright |
| Dec | 16 | Bright |
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 Grand Canyon, the air stays dry or comfortable essentially all year. Even in July, the muggiest month, it feels humid or worse only about 1% 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 | 91 | 90 | 96 | 100 | 100 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 9 | 3 | 0 | 0 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 100 | 0 | 0 |
| Apr | 100 | 0 | 0 |
| May | 100 | 0 | 0 |
| Jun | 100 | 0 | 0 |
| Jul | 91 | 8 | 1 |
| Aug | 90 | 9 | 1 |
| Sep | 96 | 3 | 0 |
| Oct | 100 | 0 | 0 |
| Nov | 100 | 0 | 0 |
| Dec | 100 | 0 | 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 Grand Canyon is typically calm, near 6 mph, and varies little with the seasons.
The windier part of the year lasts 3.9 months, from around Mar 11 to Jul 6. The windiest month is May, averaging about 7 mph (calm).
The calmer part of the year runs from around Jul 7 to Mar 10, with August the calmest month at about 5 mph.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 5 | 5 | 6 | 7 | 7 | 7 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| Jan | 5 | calm |
| Feb | 5 | calm |
| Mar | 6 | calm |
| Apr | 7 | calm |
| May | 7 | calm |
| Jun | 7 | calm |
| Jul | 5 | calm |
| Aug | 5 | calm |
| Sep | 5 | calm |
| Oct | 5 | calm |
| Nov | 5 | calm |
| Dec | 5 | calm |
Best time to visit Grand Canyon
To characterize how pleasant the weather is in Grand Canyon throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late May, Grand Canyon 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 64°F and 82°F. Based on this score, the best times of year to visit Grand Canyon for general outdoor tourist activities run from mid April to mid June and again from mid September to late October, with a peak score in the first week of October.
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) | 1.3 | 2.5 | 5.0 | 7.1 | 8.4 | 6.3 | 4.4 | 5.2 | 7.6 | 8.0 | 4.9 | 1.5 |
| Rating | poor | poor | fair | good | ideal | good | fair | fair | ideal | ideal | fair | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 1.3 | poor |
| Feb | 2.5 | poor |
| Mar | 5.0 | fair |
| Apr | 7.1 | good |
| May | 8.4 | ideal |
| Jun | 6.3 | good |
| Jul | 4.4 | fair |
| Aug | 5.2 | fair |
| Sep | 7.6 | ideal |
| Oct | 8.0 | ideal |
| Nov | 4.9 | fair |
| Dec | 1.5 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 75°F and 93°F. Based on this score, the best time of year to visit Grand Canyon for hot-weather activities is from mid May to early October, with a peak score in the second week of June.
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 Grand Canyon, 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 90°F), the essentials are light clothes and sun protection. In the cold season around January (highs near 46°F), pack a warm layer and a heavy coat.
In July, Grand Canyon sees daytime highs around 90°F and nights near 65°F. Pack light clothes and sun protection. About 6 days see rain.
UV index (midday) in Grand Canyon 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 Grand Canyon peaks around July 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 4 | 6 | 6 | 9 | 11 | 12 | 11 | 9 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | High | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 4 | Moderate |
| Mar | 6 | High |
| Apr | 6 | High |
| May | 9 | Very high |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Average hourly UV index in Grand Canyon
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 9 hours a day reach index 3 (protection recommended), and 6.5 hours reach 6 or more. 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) | 2.5 | 4 | 5.5 | 6.5 | 8 | 9 | 9 | 8.5 | 7 | 5.5 | 3 | 1 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 2 | 5 | 6.5 | 6.5 | 6 | 4.5 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 2.5 | 0 |
| Feb | 4 | 0 |
| Mar | 5.5 | 0 |
| Apr | 6.5 | 2 |
| May | 8 | 5 |
| Jun | 9 | 6.5 |
| Jul | 9 | 6.5 |
| Aug | 8.5 | 6 |
| Sep | 7 | 4.5 |
| Oct | 5.5 | 0 |
| Nov | 3 | 0 |
| Dec | 1 | 0 |
Growing season
The growing season in Grand Canyon typically lasts about 257 days, from around March 8 to November 19 — the span where a frost-free day is more likely than not. It is reliably frost-free from April 19 to October 26.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 18 | 31 | 63 | 88 | 99 | 100 | 100 | 100 | 100 | 96 | 58 | 19 |
| Frost nights | 31 | 28 | 31 | 18 | 0 | 0 | 0 | 0 | 0 | 6 | 30 | 31 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 18 | 31 |
| Feb | 31 | 28 |
| Mar | 63 | 31 |
| Apr | 88 | 18 |
| May | 99 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 96 | 6 |
| Nov | 58 | 30 |
| Dec | 19 | 31 |
Growing degree days
Growing degree days tally heat above 50°F: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Grand Canyon banks about 3,545 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 (°F·days) | 0 | 0 | 0 | 83 | 379 | 673 | 852 | 795 | 555 | 207 | 0 | 0 |
| Growing degree days (°F·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 83 |
| May | 379 |
| Jun | 673 |
| Jul | 852 |
| Aug | 795 |
| Sep | 555 |
| Oct | 207 |
| 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.
Grand Canyon receives about 5.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 2.9 and 8.5 kWh/m².
The brighter stretch of the year lasts 6.4 months, from around Mar 15 to Sep 25. The brightest month is June, averaging about 8.5 kWh/m² (intense).
The dimmest month is December, down near 3.0 kWh/m² — roughly 65% less than the June peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 3.3 | 4.3 | 5.8 | 7.2 | 8.1 | 8.5 | 7.6 | 6.9 | 6.1 | 4.8 | 3.6 | 3.0 |
| Level | Moderate | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 3.3 | Moderate |
| Feb | 4.3 | Bright |
| Mar | 5.8 | Bright |
| Apr | 7.2 | Intense |
| May | 8.1 | Intense |
| Jun | 8.5 | Intense |
| Jul | 7.6 | Intense |
| Aug | 6.9 | Intense |
| Sep | 6.1 | Intense |
| Oct | 4.8 | Bright |
| Nov | 3.6 | Moderate |
| Dec | 3.0 | Moderate |
Where is Grand Canyon?
Grand Canyon sits at 36.1°N, 112.1°W, 0 ft above sea level, in United States. The nearest listed city is Flagstaff, 65 mi away.
Topography around Grand Canyon
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Grand Canyon.
Within 2 miles, the terrain around Grand Canyon has large variations in elevation — a maximum elevation change of 3,527 ft around an average of 6,434 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,873 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 8,550 ft.
The land around Grand Canyon is covered by trees (71%) within 2 miles, trees (45%) and grassland (21%) within 10 miles, and grassland (42%), trees (23%) and bare terrain (23%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- 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 Grand Canyon (36.0544°, -112.1393°, elevation 0 ft), 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. 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).