Climate and average weather in Coos Bay
In Coos Bay, the summers are mild, dry, and mostly clear and the winters are cool and mostly cloudy.
Over the course of the year, the temperature in Coos Bay typically varies from 43°F to 68°F, and is rarely below 36°F or above 74°F. August is the hottest month of the year, while December is the coldest.
Based on the travel score, the best time of year to visit Coos Bay for warm-weather activities is from mid June to early October.
- Hottest
- Aug
- 68°
- Coldest
- Dec
- 43°
- Wettest
- Dec
- 9.5 in
- Driest
- Jul
- 0.2 in
- Rain / yr
- 51.6 in
- 130 wet days
- Daylight
- 8.8–15.2 h
- shortest–longest
- Elevation
- 23 ft
- 43.4°N
- Clearest
- Jul
- 32% cloud
Coos Bay is city in Coos County, Oregon, United States.
- Density
- 393/km²
- people per km²
- Founded
- 1853
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Coos Bay 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 June to early October.
Temperature through the year
Daily average highs and lows in Coos Bay, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.6 months, from June 19 to October 4, with daily high temperatures above 64°F. The hottest month of the year in Coos Bay is August, with an average high of 68°F and low of 55°F.
The cool season lasts 4.2 months, from November 20 to March 27, with daily high temperatures below 54°F. The coldest month of the year in Coos Bay is December, with an average low of 43°F and high of 51°F.
Days typically run about 11°F warmer than nights, with the widest day–night swing (around 14°F) in August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 52 | 53 | 56 | 60 | 63 | 67 | 68 | 67 | 61 | 55 | 51 |
| Avg low (°F) | 43 | 43 | 44 | 45 | 49 | 52 | 54 | 55 | 53 | 50 | 46 | 43 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| Jan | 51 | 43 |
| Feb | 52 | 43 |
| Mar | 53 | 44 |
| Apr | 56 | 45 |
| May | 60 | 49 |
| Jun | 63 | 52 |
| Jul | 67 | 54 |
| Aug | 68 | 55 |
| Sep | 67 | 53 |
| Oct | 61 | 50 |
| Nov | 55 | 46 |
| Dec | 51 | 43 |
Average hourly temperature in Coos Bay
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 August afternoons, near 68°F, and coldest before dawn in December, near 43°F.
Coos Bay 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 | 51° / 43° | 8.1 | 17.3 | 0.4 | 9.2 | 2.1 |
| Feb | 52° / 43° | 6.2 | 14.8 | 0.5 | 10.2 | 2.4 |
| Mar | 53° / 44° | 6.6 | 16.8 | 0.4 | 11.6 | 2.6 |
| Apr | 56° / 45° | 4.6 | 14.8 | 0.1 | 13.2 | 3.3 |
| May | 60° / 49° | 2.5 | 9.5 | 0 | 14.5 | 4.8 |
| Jun | 63° / 52° | 1.3 | 5.9 | 0 | 15.2 | 6.3 |
| Jul | 67° / 54° | 0.2 | 1.4 | 0 | 14.9 | 8.0 |
| Aug | 68° / 55° | 0.4 | 1.9 | 0 | 13.8 | 8.0 |
| Sep | 67° / 53° | 1.1 | 4.2 | 0 | 12.3 | 7.4 |
| Oct | 61° / 50° | 3.5 | 9.4 | 0 | 10.8 | 5.4 |
| Nov | 55° / 46° | 7.6 | 16.8 | 0.1 | 9.5 | 2.9 |
| Dec | 51° / 43° | 9.5 | 17.6 | 0.2 | 8.8 | 2.0 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
Coos Bay gets about 51.6 in of precipitation a year. On a typical day the chance of rain is often wet, but that rises and falls sharply with the seasons.
The wetter season lasts 6.2 months, from around Oct 25 to May 1, peaking in December at about 59% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 28.
December is the wettest month by volume, with 9.5 in over about 18 wet days; July is the driest, with 0.2 in.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 55 | 53 | 54 | 48 | 31 | 19 | 6 | 6 | 15 | 30 | 55 | 58 |
| Rain days | 17 | 15 | 17 | 15 | 10 | 6 | 1 | 2 | 4 | 9 | 17 | 18 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 55 | 17 |
| Feb | 53 | 15 |
| Mar | 54 | 17 |
| Apr | 48 | 15 |
| May | 31 | 10 |
| Jun | 19 | 6 |
| Jul | 6 | 1 |
| Aug | 6 | 2 |
| Sep | 15 | 4 |
| Oct | 30 | 9 |
| Nov | 55 | 17 |
| Dec | 58 | 18 |
Monthly rainfall
Over a full year, Coos Bay collects about 51.6 in of rain across 130 wet days — roughly 4.3 in in an average month.
It doesn’t fall evenly. December is the wettest month with 9.5 in, while July is the driest at just 0.2 in. The three wettest months alone bring about 49% 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) | 8.1 | 6.2 | 6.6 | 4.6 | 2.5 | 1.3 | 0.2 | 0.4 | 1.1 | 3.5 | 7.6 | 9.5 |
| Rain days | 17 | 15 | 17 | 15 | 10 | 6 | 1 | 2 | 4 | 9 | 17 | 18 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rainfall (in) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 8.1 | 17 | 0 |
| Feb | 6.2 | 15 | 1 |
| Mar | 6.6 | 17 | 0 |
| Apr | 4.6 | 15 | 0 |
| May | 2.5 | 10 | 0 |
| Jun | 1.3 | 6 | 0 |
| Jul | 0.2 | 1 | 0 |
| Aug | 0.4 | 2 | 0 |
| Sep | 1.1 | 4 | 0 |
| Oct | 3.5 | 9 | 0 |
| Nov | 7.6 | 17 | 0 |
| Dec | 9.5 | 18 | 0 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In Coos Bay, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around June 2 and lasts for 4.8 months, ending around October 25. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 83% of the time on average.
The cloudier part of the year begins around October 26 and lasts for 7.2 months, ending around June 1. The cloudiest month is December, when it is overcast or mostly cloudy 74% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 28 | 29 | 29 | 35 | 45 | 59 | 79 | 83 | 75 | 55 | 34 | 26 |
| Cloudier (%) | 72 | 71 | 71 | 65 | 55 | 41 | 21 | 17 | 25 | 45 | 66 | 74 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 28 | 72 |
| Feb | 29 | 71 |
| Mar | 29 | 71 |
| Apr | 35 | 65 |
| May | 45 | 55 |
| Jun | 59 | 41 |
| Jul | 79 | 21 |
| Aug | 83 | 17 |
| Sep | 75 | 25 |
| Oct | 55 | 45 |
| Nov | 34 | 66 |
| Dec | 26 | 74 |
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 12, brings about 15 h 12 min of light; the shortest, around January 1, only 8 h 48 min — a swing of roughly 6 h 24 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.2 | 10.2 | 11.6 | 13.2 | 14.5 | 15.2 | 14.9 | 13.8 | 12.3 | 10.8 | 9.5 | 8.8 |
| Sunrise (AM) | 7:53 | 7:25 | 6:38 | 5:41 | 4:58 | 4:41 | 4:55 | 5:27 | 6:02 | 6:38 | 7:18 | 7:49 |
| Sunset (PM) | 5:00 | 5:38 | 6:15 | 6:53 | 7:28 | 7:53 | 7:50 | 7:15 | 6:20 | 5:26 | 4:46 | 4:37 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.2 | 7:53 | 5:00 |
| Feb | 10.2 | 7:25 | 5:38 |
| Mar | 11.6 | 6:38 | 6:15 |
| Apr | 13.2 | 5:41 | 6:53 |
| May | 14.5 | 4:58 | 7:28 |
| Jun | 15.2 | 4:41 | 7:53 |
| Jul | 14.9 | 4:55 | 7:50 |
| Aug | 13.8 | 5:27 | 7:15 |
| Sep | 12.3 | 6:02 | 6:20 |
| Oct | 10.8 | 6:38 | 5:26 |
| Nov | 9.5 | 7:18 | 4:46 |
| Dec | 8.8 | 7:49 | 4:37 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
Coos Bay averages about 10 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 5 and 22 days.
The sunnier stretch runs 4.6 months, from around Jun 10 to Oct 27. The sunniest month is July, with roughly 20 sunny days (bright).
The greyest month is March, down near 5 sunny days — about 75% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 6 | 5 | 5 | 6 | 8 | 12 | 20 | 21 | 17 | 13 | 6 | 5 |
| Sky | Gloomy | Gloomy | Gloomy | Gloomy | Gloomy | Mixed | Bright | Bright | Bright | Mixed | Gloomy | Gloomy |
| Sunny days | Sky | |
|---|---|---|
| Jan | 6 | Gloomy |
| Feb | 5 | Gloomy |
| Mar | 5 | Gloomy |
| Apr | 6 | Gloomy |
| May | 8 | Gloomy |
| Jun | 12 | Mixed |
| Jul | 20 | Bright |
| Aug | 21 | Bright |
| Sep | 17 | Bright |
| Oct | 13 | Mixed |
| Nov | 6 | Gloomy |
| Dec | 5 | 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 Coos Bay, the air stays dry or comfortable essentially all year. Even in September, 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 | 98 | 92 | 73 | 66 | 78 | 94 | 98 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 2 | 8 | 27 | 34 | 22 | 5 | 2 | 0 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| Jan | 100 | 0 |
| Feb | 100 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 98 | 2 |
| Jun | 92 | 8 |
| Jul | 73 | 27 |
| Aug | 66 | 34 |
| Sep | 78 | 22 |
| Oct | 94 | 5 |
| Nov | 98 | 2 |
| 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 Coos Bay is typically light breeze, near 9 mph, and varies little with the seasons.
The windier part of the year lasts 5.1 months, from around Nov 11 to Apr 14. The windiest month is December, averaging about 10 mph (light breeze).
The calmer part of the year runs from around Jul 25 to Nov 10, with September the calmest month at about 8 mph.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 10 | 9 | 9 | 9 | 8 | 9 | 9 | 8 | 8 | 8 | 9 | 10 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| Jan | 10 | light breeze |
| Feb | 9 | light breeze |
| Mar | 9 | light breeze |
| Apr | 9 | light breeze |
| May | 8 | light breeze |
| Jun | 9 | light breeze |
| Jul | 9 | light breeze |
| Aug | 8 | light breeze |
| Sep | 8 | light breeze |
| Oct | 8 | light breeze |
| Nov | 9 | light breeze |
| Dec | 10 | light breeze |
Hazard calendar for Coos Bay
When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.
Coos Bay's rainy season runs November–April, when most of the year's rain falls.
Best time to visit Coos Bay
To characterize how pleasant the weather is in Coos Bay throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around late September, Coos Bay 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 time of year to visit Coos Bay for general outdoor tourist activities is from mid June to early October, 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) | 2.1 | 2.4 | 2.6 | 3.3 | 4.8 | 6.4 | 7.9 | 8.0 | 7.3 | 5.4 | 2.9 | 2.0 |
| Rating | poor | poor | poor | poor | fair | good | ideal | ideal | good | fair | poor | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 2.1 | poor |
| Feb | 2.4 | poor |
| Mar | 2.6 | poor |
| Apr | 3.3 | poor |
| May | 4.8 | fair |
| Jun | 6.4 | good |
| Jul | 7.9 | ideal |
| Aug | 8.0 | ideal |
| Sep | 7.3 | good |
| Oct | 5.4 | fair |
| Nov | 2.9 | poor |
| Dec | 2.0 | 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 Coos Bay for hot-weather activities is from early July to mid September, with a peak score in the second week of August.
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 Coos Bay, 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 August (highs near 68°F), the essentials are sun protection. In the cold season around December (highs near 51°F), pack a warm layer and rain gear.
In August, Coos Bay sees daytime highs around 68°F and nights near 55°F. Pack sun protection.
Sea temperature near Coos Bay
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 8 mi away) is warmest in September at about 56°F and coldest in February near 51°F.
The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 51 | 51 | 51 | 52 | 53 | 55 | 55 | 56 | 56 | 55 | 53 | 52 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 51 | Bracing |
| Feb | 51 | Bracing |
| Mar | 51 | Bracing |
| Apr | 52 | Bracing |
| May | 53 | Bracing |
| Jun | 55 | Bracing |
| Jul | 55 | Bracing |
| Aug | 56 | Bracing |
| Sep | 56 | Bracing |
| Oct | 55 | Bracing |
| Nov | 53 | Bracing |
| Dec | 52 | Bracing |
UV index (midday) in Coos Bay 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 Coos Bay peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 5 | 9 | 8 | 9 | 7 | 5 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 9 | Very high |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Average hourly UV index in Coos Bay
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 8 hours a day reach index 3 (protection recommended), and 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) | 0 | 0 | 4.5 | 6 | 8 | 8 | 8 | 7 | 5 | 3 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 0 | 5 | 4.5 | 5 | 3 | 0 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 4.5 | 0 |
| Apr | 6 | 0 |
| May | 8 | 5 |
| Jun | 8 | 4.5 |
| Jul | 8 | 5 |
| Aug | 7 | 3 |
| Sep | 5 | 0 |
| Oct | 3 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Growing season
Coos Bay is frost-free year round — even the coldest nights rarely reach freezing, so there is no start or end to the growing season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 99 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 |
| Frost nights | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 99 | 0 |
| Feb | 99 | 0 |
| Mar | 100 | 0 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 100 | 0 |
| Dec | 99 | 0 |
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. Coos Bay banks about 1,565 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°F·days) | 0 | 0 | 0 | 21 | 128 | 227 | 335 | 354 | 304 | 174 | 23 | 0 |
| Growing degree days (°F·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 0 |
| Apr | 21 |
| May | 128 |
| Jun | 227 |
| Jul | 335 |
| Aug | 354 |
| Sep | 304 |
| Oct | 174 |
| Nov | 23 |
| 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.
Coos Bay receives about 4.1 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.3 and 7.2 kWh/m².
The brighter stretch of the year lasts 6.0 months, from around Mar 31 to Sep 28. The brightest month is July, averaging about 7.1 kWh/m² (intense).
The dimmest month is December, down near 1.3 kWh/m² — roughly 81% less than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.5 | 2.4 | 3.5 | 4.8 | 6.0 | 6.6 | 7.2 | 6.3 | 4.9 | 3.1 | 1.8 | 1.3 |
| Level | Dim | Moderate | Moderate | Bright | Bright | Intense | Intense | Intense | Bright | Moderate | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 1.5 | Dim |
| Feb | 2.4 | Moderate |
| Mar | 3.5 | Moderate |
| Apr | 4.8 | Bright |
| May | 6.0 | Bright |
| Jun | 6.6 | Intense |
| Jul | 7.2 | Intense |
| Aug | 6.3 | Intense |
| Sep | 4.9 | Bright |
| Oct | 3.1 | Moderate |
| Nov | 1.8 | Dim |
| Dec | 1.3 | Dim |
Where is Coos Bay?
Coos Bay sits at 43.4°N, 124.2°W, 23 ft above sea level, in United States. The nearest listed city is Roseburg, 45 mi away.
Topography around Coos Bay
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Coos Bay.
Within 2 miles, the terrain around Coos Bay has only modest variations in elevation — a maximum elevation change of 600 ft around an average of 112 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,742 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 4,088 ft.
The land around Coos Bay is covered by trees (54%) and water (20%) within 2 miles, trees (65%) and water (23%) within 10 miles, and trees (64%) and water (27%) 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 Coos Bay (43.3665°, -124.2179°, elevation 23 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. 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).