Climate Comfort Score
48/100
Moderate
NOAA 1991–2020 normals 51°F annual avg Public-domain federal data
Coos Bay, OR Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 51°F
- Avg annual temp
- 48/100
- Comfort score
- 65.3"
- Annual precip
- 199d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Coos Bay
Coos Bay, Oregon averages 51°F a year and scores 48/100 on the comfort index - moderate, milder than 18% of U.S. cities.
- 51°F
- annual average temperature (NOAA normal)
- 48/100
- comfort score, milder than 18% of U.S. cities
- 65.3"
- yearly precipitation total
- 199 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
51°F (10°C)
Avg High
59°F
Avg Low
42°F
Annual Precip
65.3"
Comfort Score
48/100
Moderate
Avg Annual Temperature
51°F
30-year mean (NOAA NCEI)
Annual Precipitation
65.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Coos Bay) 48.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Coos Bay area.
How Coos Bay compares to every U.S. city
Coos Bay's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
48 Top 82% higher than 18% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Coos Bay
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Coos Bay, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 52°F (11°C) | 36°F (2°C) | 44°F (7°C) | 10.7" | 11.0 | 0.0 |
| February | 54°F (12°C) | 37°F (3°C) | 45°F (7°C) | 8.5" | 9.6 | 0.0 |
| March | 56°F (13°C) | 38°F (3°C) | 47°F (8°C) | 8.4" | 7.8 | 0.0 |
| April | 57°F (14°C) | 39°F (4°C) | 48°F (9°C) | 5.5" | 3.4 | 0.0 |
| May | 60°F (15°C) | 44°F (7°C) | 52°F (11°C) | 2.9" | 0.6 | 0.0 |
| June | 62°F (17°C) | 47°F (8°C) | 55°F (13°C) | 2.5" | 0.0 | 0.0 |
| July | 64°F (18°C) | 51°F (10°C) | 57°F (14°C) | 0.5" | 0.0 | 0.0 |
| August | 66°F (19°C) | 50°F (10°C) | 58°F (14°C) | 0.5" | 0.0 | 0.0 |
| September | 66°F (19°C) | 47°F (8°C) | 56°F (13°C) | 1.8" | 0.0 | 0.2 |
| October | 63°F (17°C) | 42°F (5°C) | 52°F (11°C) | 4.2" | 3.0 | 0.0 |
| November | 56°F (13°C) | 39°F (4°C) | 48°F (9°C) | 9.0" | 6.3 | 0.0 |
| December | 51°F (11°C) | 36°F (2°C) | 44°F (7°C) | 10.9" | 12.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 10.7"
18.2 days with precipitation
February 8.5"
19.3 days with precipitation
March 8.4"
20.8 days with precipitation
April 5.5"
19.0 days with precipitation
May 2.9"
15.6 days with precipitation
June 2.5"
11.9 days with precipitation
July 0.5"
7.1 days with precipitation
August 0.5"
8.2 days with precipitation
September 1.8"
7.9 days with precipitation
October 4.2"
14.2 days with precipitation
November 9.0"
18.5 days with precipitation
December 10.9"
20.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 31
50% probability date
Last Spring Freeze
April 15
50% probability date
Growing Season
199 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,295
Higher = more heating needed
Cooling Degree Days
0
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What Coos Bay's climate means for you
Coos Bay runs 51°F a year - peaking in August, coldest in December.
- Gardeners get about 199 frost-free days, with the last spring freeze near April 15 - plan the planting calendar around it, not the regional average.
- Energy bills track 5,295 heating and 0 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Coos Bay, OR
The NOAA 1991–2020 climate normals describe Coos Bay, Oregon as a location with an annual average temperature of 51°F, ranging from a mean daily high of 59°F to a mean daily low of 42°F. August is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USW00004141, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Coos Bay averages 65.3 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 199 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 15 and the first fall freeze near October 31. As for energy demand, 5,295 heating degree days and 0 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Coos Bay scores 48/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings August-driven heat, and deep winter brings December-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Coos Bay, OR? ▼
The average annual temperature in Coos Bay, Oregon is 51°F. The warmest month averages 66°F (19°C) and the coldest averages 36°F (2°C).
How much rain does Coos Bay get? ▼
Coos Bay receives 65.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Coos Bay? ▼
Coos Bay has a climate comfort score of 48/100 (Moderate), milder than 18% of U.S. cities in the PlainClimate database.
When is the growing season in Coos Bay? ▼
Coos Bay has approximately 199 frost-free days per year, with the last spring freeze around April 15 and the first fall freeze around October 31.
How much energy does heating and cooling require in Coos Bay? ▼
Coos Bay has 5,295 heating degree days and 0 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Coos Bay climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00004141 near Coos Bay.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00004141. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.