Trinity Rvr Hatchery, CA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Trinity Rvr Hatchery's primary NOAA station, TRINITY RVR HATCHERY.
The climate verdict for Trinity Rvr Hatchery
Trinity Rvr Hatchery, California has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 56°F. It scores 78/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 72% of them.
- 56°F
- annual average temperature (NOAA normal)
- 78/100
- comfort score, above 72% of station-mapped location scores
- 32.4"
- annual precipitation · 6" snow
- 182 days
- growing season, frost-free days
Trinity Rvr Hatchery: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00049026 · Trinity Rvr Hatchery, CA 56°F mean · 32.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 56°F
- RANK-UPPER #4,391
- PHOTO-FINISH ≈ Nevada City
- PRCP-MID 32.4"
- SWING-MID 35°F
- COMF-TOP 78/100
- LOAD-HEAT 4,034 HDD
- STN-1 USC00049026
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Nevada City, CA (+ 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.
- Hot Glenwood, NM 57°F
- Trinity Rvr Hat… (this station) 56°F
- Cold Loraine, CA 56°F
- Near Nevada City, CA 56°F
- Near N Fork, NC 56°F
Climate Living Index · Trinity Rvr Hatchery
Trinity Rvr Hatchery: 71/100 · grade B
Trinity Rvr Hatchery publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Trinity Rvr Hatchery, not an official NOAA rating. Rankings still use Comfort Score 78/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 32.4 in · 2.6 from 35 in | 90/100 · A |
| Normal heat + freeze calendar | 96 calendar days | 77/100 · B |
| Snowfall burden | 6.4 inches/year | 69/100 · C |
| Annual temperature balance | 56.2°F · 11.3° from 67.5°F | 64/100 · C |
| Frost-free season | 182 days/year | 51/100 · D |
Trinity Rvr Hatchery · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Trinity Rvr Hatchery is a temperate Köppen climate: Csa
Coldest-month mean 40.2°F and warmest-month mean 74.8°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
- 74.8°F
- Coldest month
- 40.2°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 · heating-led station
Where Trinity Rvr Hatchery sits across the climate record
Three NOAA fields for Trinity Rvr Hatchery's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 64th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 43rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 83%
- Warmest-to-coldest month gap for Trinity Rvr Hatchery is compact versus 6,861 complete station-years.
How Trinity Rvr Hatchery compares across U.S. station-mapped locations
Trinity Rvr Hatchery's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
78 Top 28% score exceeds 72% 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%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Trinity Rvr Hatchery's measured station temperature trend
MethodologyAcross 43 complete annual observations from 1975 to 2025, TRINITY RVR HATCHERY warmed at a fitted rate of 0.29°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Trinity Rvr Hatchery primary station fitted change +0.29 °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 | 50°F (10°C) | 33°F (0°C) | 41°F (5°C) | 6.0" | 1.2" | 15.3 | 0.0 |
| February | 56°F (13°C) | 33°F (0°C) | 45°F (7°C) | 4.7" | 1.6" | 13.4 | 0.0 |
| March | 62°F (16°C) | 35°F (2°C) | 48°F (9°C) | 4.1" | 0.3" | 10.5 | 0.0 |
| April | 68°F (20°C) | 38°F (3°C) | 53°F (12°C) | 2.6" | 0.0" | 6.1 | 0.1 |
| May | 77°F (25°C) | 44°F (7°C) | 61°F (16°C) | 1.7" | 0.0" | 0.6 | 3.8 |
| June | 87°F (30°C) | 49°F (9°C) | 68°F (20°C) | 0.9" | 0.0" | 0.0 | 10.5 |
| July | 96°F (35°C) | 54°F (12°C) | 75°F (24°C) | 0.2" | 0.0" | 0.0 | 23.9 |
| August | 94°F (35°C) | 52°F (11°C) | 73°F (23°C) | 0.1" | 0.0" | 0.0 | 23.0 |
| September | 89°F (32°C) | 46°F (8°C) | 67°F (20°C) | 0.3" | 0.0" | 0.1 | 14.5 |
| October | 76°F (24°C) | 39°F (4°C) | 57°F (14°C) | 1.9" | 0.0" | 4.8 | 1.9 |
| November | 58°F (15°C) | 36°F (2°C) | 47°F (8°C) | 3.5" | 0.6" | 10.2 | 0.0 |
| December | 48°F (9°C) | 32°F (0°C) | 40°F (5°C) | 6.5" | 2.7" | 17.2 | 0.0 |
The year, day by day
Trinity Rvr Hatchery works both ends of the calendar. Normal highs climb to 97°F by July 22 and hold at or above 90°F on 80 dates, then normal lows drop to freezing or below on 16 dates, bottoming at 32°F around December 19.
When the heat sits
Normal highs reach 90°F from June 25 through September 12, covering 80 dates. The broader mild season, normal highs of 70°F or more, runs April 24 to October 25.
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.
The freezing stretch
Freezing normal lows set in around December 15, covering 16 dates.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is January 7, when 48% of years recorded at least a hundredth of an inch. The driest is August 9 at 3%. Summed across the calendar, that is about 95 wet dates a year.
The widest day
September 10 carries the biggest normal gap between afternoon and dawn, 44°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Trinity Rvr Hatchery.
Where Trinity Rvr Hatchery Stands Nationally
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 44°F, sharper than nine in ten ranked stations see.
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 80 days a year, more than four out of five ranked stations record.
Trinity Rvr Hatchery 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
Snow: 1.2"
14.8 days with precipitation
Snow: 1.6"
12.3 days with precipitation
Snow: 0.3"
13.1 days with precipitation
9.5 days with precipitation
7.5 days with precipitation
3.2 days with precipitation
1.0 days with precipitation
1.0 days with precipitation
1.9 days with precipitation
5.3 days with precipitation
Snow: 0.6"
10.8 days with precipitation
Snow: 2.7"
14.8 days with precipitation
Trinity Rvr Hatchery's wet season runs through the cold months
December, January and February carry 53% of the year's precipitation here, while June through August contribute 4%. 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 34.6°F seasonal spread.
- Wettest month
- December, 6.5"
- Driest month
- August, 0.1"
- Wettest three months
- December, January, February (53% 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 Trinity Rvr Hatchery's precipitation splits across the calendar
About 95 days a year record measurable precipitation here, carrying 32.4" between them, or roughly 0.34 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.
Snow reaches Trinity Rvr Hatchery, but rarely amounts to much
The normals record 6.4 inches of snow a year here, most likely in December. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 4 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 22
50% probability date
Last Spring Freeze
April 23
50% probability date
Growing Season
182 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,034
Higher = more heating needed
Cooling Degree Days
856
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Trinity Rvr Hatchery 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 (56°F here).
- Baltimore, MD 56°F · 0.0°F off
- Cape May, NJ 56°F · 0.0°F off
- Carrizozo, NM 56°F · 0.0°F off
- Galena, MO 56°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (32.4" here), excluding temperature-peer places.
- Houghton Lake, MI 32.4" · 0.0" off
- Fairbury, NE 32.4" · 0.0" off
- Washington, KS 32.4" · 0.0" off
- Fond Du Lac, WI 32.4" · 0.0" off
Data-derived climate profile
How Trinity Rvr Hatchery's climate pattern fits together
heating led · moderate · mid swing
Trinity Rvr Hatchery's energy balance leans toward cold weather: 4,034 annual heating degree days against 856 for cooling. Its 34.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Trinity Rvr Hatchery's frost-free season lasts about 182 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and December mark the typical warm and cold ends of the calendar in Trinity Rvr Hatchery's middle-range seasonal profile. The measured spread is 34.6°F. The annual average is 56°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Trinity Rvr Hatchery's 32.4 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Annual snowfall totals 6.4 inches. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Trinity Rvr Hatchery's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Trinity Rvr Hatchery, not an official NOAA class or a year-ahead forecast.
Questions about Trinity Rvr Hatchery's climate
How much rain does Trinity Rvr Hatchery get? ▼
How many days above 90°F does Trinity Rvr Hatchery get? ▼
How much energy does heating and cooling require in Trinity Rvr Hatchery? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Trinity Rvr Hatchery's primary station: TRINITY RVR HATCHERY (USC00049026). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Trinity Rvr Hatchery; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Trinity Rvr Hatchery 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.