Colusa, CA Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from Colusa's primary NOAA station, COLUSA 2 SSW.
The climate verdict for Colusa
Dryness leads the climate profile for Colusa, California, with 17.2 inches of precipitation a year. NOAA records an annual average of 62°F. It scores 87/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 87% of them.
- 62°F
- average temperature, NOAA 1991-2020 normal
- 87/100
- comfort score, above 87% of station-mapped location scores
- 17.2"
- precipitation, annual total
- 290 days
- frost-free growing season
Colusa: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00041948 · Colusa, CA 62°F mean · 17.2" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 62°F
- RANK-UPPER #5,420
- PHOTO-FINISH ≈ Atlanta Peachtr…
- PRCP-DRY 17.2"
- SWING-MID 30°F
- COMF-TOP 87/100
- LOAD-MIX H/C balanced
- STN-1 USC00041948
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Atlanta Peachtree, GA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CA station list.
- Colusa (this station) 62°F
- Hot Clemson Univ, SC 62°F
- Near Atlanta Peachtr…, GA 62°F
- Near Chickasaw Nra, OK 62°F
- Near Clarendon, AR 62°F
Climate Living Index · Colusa
Colusa: 77/100 · grade B
Colusa publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Colusa, not an official NOAA rating. Rankings still use Comfort Score 87/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 290 days/year | 100/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Normal heat + freeze calendar | 82 calendar days | 82/100 · B |
| Annual temperature balance | 61.5°F · 6.0° from 67.5°F | 81/100 · B |
| Precipitation balance | 17.2 in · 17.8 from 35 in | 37/100 · F |
Colusa · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Colusa is a temperate Köppen climate: Csa
Coldest-month mean 46.1°F and warmest-month mean 76.2°F place this station in temperate, dry-summer, hot summer climates (Csa). Class Csa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, hot summer.
- Köppen code
- Csa
- Group
- Temperate
- Warmest month
- 76.2°F
- Coldest month
- 46.1°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Colusa sits across the climate record
Three NOAA fields for Colusa's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 21% warmest
- Among 6,861 stations, Colusa sits in the warmer third of annual means.
- Annual precipitation
- Drier than 78%
- Colusa's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 90%
- Warmest-to-coldest month gap for Colusa is compact versus 6,861 complete station-years.
How Colusa compares across U.S. station-mapped locations
Colusa's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
87 Top 13% score exceeds 87% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Colusa's measured station temperature trend
MethodologyAcross 50 complete annual observations from 1949 to 2022, COLUSA 2 SSW warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Colusa primary station fitted change +0.10 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 55°F (13°C) | 38°F (3°C) | 46°F (8°C) | 3.6" | 0.0" | 5.1 | 0.0 |
| February | 60°F (16°C) | 41°F (5°C) | 51°F (10°C) | 3.0" | 0.0" | 2.1 | 0.0 |
| March | 67°F (19°C) | 44°F (7°C) | 55°F (13°C) | 2.2" | 0.0" | 0.5 | 0.0 |
| April | 73°F (23°C) | 46°F (8°C) | 60°F (15°C) | 1.0" | 0.0" | 0.2 | 1.1 |
| May | 81°F (27°C) | 53°F (12°C) | 67°F (20°C) | 0.8" | 0.0" | 0.1 | 6.7 |
| June | 88°F (31°C) | 59°F (15°C) | 73°F (23°C) | 0.5" | 0.0" | 0.0 | 14.2 |
| July | 92°F (34°C) | 60°F (16°C) | 76°F (25°C) | 0.0" | 0.0" | 0.0 | 22.2 |
| August | 92°F (33°C) | 58°F (15°C) | 75°F (24°C) | 0.0" | 0.0" | 0.0 | 21.2 |
| September | 89°F (32°C) | 54°F (12°C) | 72°F (22°C) | 0.1" | 0.0" | 0.0 | 16.2 |
| October | 79°F (26°C) | 48°F (9°C) | 64°F (18°C) | 0.9" | 0.0" | 0.0 | 3.7 |
| November | 64°F (18°C) | 42°F (5°C) | 53°F (12°C) | 1.9" | 0.0" | 2.1 | 0.0 |
| December | 55°F (13°C) | 38°F (3°C) | 46°F (8°C) | 3.2" | 0.0" | 6.9 | 0.0 |
The year, day by day
The year in Colusa runs from a mild 37°F around December 20 to 93°F at the peak near July 14, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 23 through September 12, covering 82 dates. The broader mild season, normal highs of 70°F or more, runs April 3 to November 3.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 37°F around December 20.
Where the wet dates fall
The likeliest wet date is January 7, when 34% of years recorded at least a hundredth of an inch. The driest is July 22 at 1%. Summed across the calendar, that is about 56 wet dates a year.
The widest day
September 14 carries the biggest normal gap between afternoon and dawn, 35°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Colusa.
Where Colusa Stands Nationally
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 82 days a year, more than four out of five ranked stations record.
Daily temperature swings run wider than most of the country, peaking near 35°F between the normal high and low.
Colusa earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
10.6 days with precipitation
8.6 days with precipitation
8.2 days with precipitation
5.0 days with precipitation
3.0 days with precipitation
1.0 days with precipitation
0.1 days with precipitation
0.2 days with precipitation
0.5 days with precipitation
2.6 days with precipitation
5.8 days with precipitation
9.3 days with precipitation
Colusa's wet season runs through the cold months
December, January and February carry 57% of the year's precipitation here, while June through August contribute 3%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows a 30.1°F seasonal spread.
- Wettest month
- January, 3.6"
- Driest month
- July, 0.0"
- Wettest three months
- January, December, February (57% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
How Colusa's precipitation splits across the calendar
About 55 days a year record measurable precipitation here, carrying 17.2" between them, or roughly 0.31 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Colusa's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
December 1
50% probability date
Last Spring Freeze
February 14
50% probability date
Growing Season
290 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,587
Higher = more heating needed
Cooling Degree Days
1,329
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Colusa on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (62°F here).
- Clarendon, AR 62°F · 0.0°F off
- Clinton, NC 62°F · 0.0°F off
- Jackson Springs, NC 62°F · 0.0°F off
- Marathon, TX 62°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (17.2" here), excluding temperature-peer places.
- Eagle Nest, NM 17.2" · 0.0" off
- Mott, ND 17.2" · 0.0" off
- Fleming, CO 17.2" · 0.0" off
- Seminole, TX 17.2" · 0.0" off
Data-derived climate profile
How Colusa's climate pattern fits together
mixed demand · dry · mid swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 17.2 inches annually, within PlainClimate's dry band. Recorded annual snowfall is negligible. The monthly distribution matters because the total alone does not reveal the timing.
July and December mark the typical warm and cold ends of the calendar in Colusa's middle-range seasonal profile. The measured spread is 30.1°F. The annual average is 62°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Colusa's normal, at 2,587 and 1,329 degree days respectively. Neither total exceeds the other by more than two to one, so the record is better read as a mixed-demand calendar than as heating-led or cooling-led.
Colusa has a long frost-free window of roughly 290 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
These labels group NOAA 1991-2020 normals from Colusa's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Colusa, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Colusa's climate
How much rain does Colusa get? ▼
How many days above 90°F does Colusa get? ▼
How much energy does heating and cooling require in Colusa? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Colusa's primary station: COLUSA 2 SSW (USC00041948). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 0614946). Match rule for Colusa: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Colusa comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.