Coos Bay in Spring
In spring (March, April and May), Coos Bay sees average daytime highs around 56°F and overnight lows near 46°F, with 13.7 in of precipitation over about 41 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs climb from about 53°F in early March to 61°F by late May. The sky is clear or mostly clear about 21% of the time across spring, and the air most often feels dry.
Spring is Coos Bay's 3rd-best season to visit on our travel score. For the whole year in context, see Coos Bay's year-round climate.
- Avg daytime high
- 56°F
- 3rd-warmest season
- Avg overnight low
- 46°F
- Precipitation
- 13.7 in
- 41 wet days
- Avg wind
- 9 mph
- Travel score
- 3.6
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Coos Bay in Spring
Over the season highs climb from about 53°F in early March to 61°F by late May.
A typical spring day in Coos Bay reaches about 56°F and drops to 46°F overnight. The warmest of the three months is May, the coolest March.
Coos Bay weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| 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 |
Cloud cover in Spring
The sky is clear or mostly clear about 21% of the time across spring.
Chance of precipitation in Spring
Coos Bay gets around 13.7 in of rain and snow over 41 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 9 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 10 h 54 min in early March to 14 h 54 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 4.8 kWh/m².
Hazard calendar for Coos Bay
In spring, Coos Bay overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Coos Bay's rainy season runs November–April, when most of the year's rain falls.
Is spring a good time to visit Coos Bay?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a weaker month for outdoor sightseeing in Coos Bay.
What to pack for Coos Bay in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Coos Bay sees daytime highs around 56°F and nights near 46°F. Pack a warm layer and rain gear. Worth having: sun protection. About 41 days see rain.
Sea temperature near Coos Bay in Spring
The nearest coast averages about 52°F across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
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 in Coos Bay in Spring
Clear-sky midday UV across spring averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
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 |
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.