Richardson GR State Park, 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 Richardson GR State Park's primary NOAA station, RICHARDSON GR SP.
The climate verdict for Richardson GR State Park
Water is the standout signal in Richardson GR State Park, California: 65.4 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 56°F. Its climate comfort score of 67/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 56°F
- annual average temperature (NOAA normal)
- 67/100
- comfort score, above 56% of station-mapped location scores
- 65.4"
- precipitation, annual total
- 266 days
- frost-free growing season
Richardson GR State Park: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047404 · Richardson GR State Park, CA 56°F mean · 65.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 56°F
- RANK-UPPER #4,391
- PHOTO-FINISH ≈ Nature Park-bea…
- PRCP-WET 65.4"
- SWING-NARROW 27°F
- COMF-MID 67/100
- LOAD-HEAT 3,734 HDD
- STN-1 USC00047404
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Nature Park-beaverton, OR ( -0.3 °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 Riddle, OR 57°F
- Near Portal, AZ 57°F
- Richardson GR S… (this station) 56°F
- Near Nature Park-bea…, OR 56°F
- Cold Elkton, OR 55°F
Climate Living Index · Richardson GR State Park
Richardson GR State Park: 69/100 · grade C
Richardson GR State Park publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Richardson GR State Park, not an official NOAA rating. Rankings still use Comfort Score 67/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 266 days/year | 93/100 · A |
| Snowfall burden | 0.2 inches/year | 89/100 · A |
| Annual temperature balance | 56.1°F · 11.4° from 67.5°F | 63/100 · C |
| Precipitation balance | 65.4 in · 30.4 from 35 in | 0/100 · F |
Richardson GR State Park · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Richardson GR State Park is a temperate Köppen climate: Csb
Coldest-month mean 43.7°F and warmest-month mean 70.3°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 70.3°F
- Coldest month
- 43.7°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 Richardson GR State Park sits across the climate record
Three NOAA fields for Richardson GR State Park'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
- Top 3% wettest
- Richardson GR State Park's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 93%
- Warmest-to-coldest month gap for Richardson GR State Park is compact versus 6,861 complete station-years.
How Richardson GR State Park compares across U.S. station-mapped locations
Richardson GR State Park's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
67 Top 44% score exceeds 56% 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%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 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
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) | 39°F (4°C) | 44°F (7°C) | 12.7" | 0.0" | 5.4 | 0.0 |
| February | 53°F (11°C) | 40°F (4°C) | 46°F (8°C) | 11.3" | 0.0" | 3.4 | 0.0 |
| March | 59°F (15°C) | 41°F (5°C) | 50°F (10°C) | 9.7" | 0.0" | 2.1 | 0.0 |
| April | 64°F (18°C) | 42°F (6°C) | 53°F (12°C) | 5.1" | 0.0" | 0.9 | 0.0 |
| May | 72°F (22°C) | 47°F (8°C) | 59°F (15°C) | 1.9" | 0.0" | 0.8 | 1.1 |
| June | 77°F (25°C) | 51°F (11°C) | 64°F (18°C) | 0.8" | 0.0" | 0.0 | 2.4 |
| July | 86°F (30°C) | 54°F (12°C) | 70°F (21°C) | 0.0" | 0.0" | 0.1 | 9.5 |
| August | 87°F (30°C) | 54°F (12°C) | 70°F (21°C) | 0.0" | 0.0" | 0.0 | 9.4 |
| September | 83°F (28°C) | 50°F (10°C) | 67°F (19°C) | 0.4" | 0.0" | 0.0 | 7.3 |
| October | 70°F (21°C) | 45°F (7°C) | 57°F (14°C) | 2.7" | 0.0" | 0.0 | 0.5 |
| November | 55°F (13°C) | 41°F (5°C) | 48°F (9°C) | 6.7" | 0.0" | 2.7 | 0.0 |
| December | 49°F (9°C) | 38°F (4°C) | 44°F (7°C) | 14.0" | 0.2" | 6.3 | 0.0 |
The year, day by day
The calendar barely moves in Richardson GR State Park: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 38°F near December 14 and 88°F near July 28.
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 38°F around December 14.
Where the wet dates fall
The likeliest wet date is January 22, when 53% of years recorded at least a hundredth of an inch. The driest is July 28 at 1%. Summed across the calendar, that is about 92 wet dates a year.
The widest day
September 11 carries the biggest normal gap between afternoon and dawn, 34°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Richardson GR State Park.
Where Richardson GR State Park Stands Nationally
This is one of the wettest normals climates ranked: about 65 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Daily temperature swings run wider than most of the country, peaking near 34°F between the normal high and low.
Richardson GR State Park 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
16.6 days with precipitation
14.0 days with precipitation
11.5 days with precipitation
9.0 days with precipitation
5.6 days with precipitation
2.1 days with precipitation
0.2 days with precipitation
0.4 days with precipitation
0.7 days with precipitation
4.3 days with precipitation
12.0 days with precipitation
Snow: 0.2"
15.1 days with precipitation
Richardson GR State Park's wet season runs through the cold months
December, January and February carry 58% of the year's precipitation here, while June through August contribute 1%. 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 an unusually narrow 26.6°F seasonal spread.
- Wettest month
- December, 14.0"
- Driest month
- July, 0.0"
- Wettest three months
- December, January, February (58% 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.
When it rains in Richardson GR State Park, it arrives in quantity
65.4" of precipitation falls across only about 92 wet days here, averaging 0.72 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 92 a year, 25% of all days
- Average depth per wet day
- 0.72 inches
- Most wet days
- January, about 17
- Fewest wet days
- July, about 0
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Snow reaches Richardson GR State Park, but rarely amounts to much
The normals record 0.2 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.
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
December 1
50% probability date
Last Spring Freeze
March 10
50% probability date
Growing Season
266 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,734
Higher = more heating needed
Cooling Degree Days
494
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Richardson GR State Park 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).
- Bushland, TX 56°F · 0.0°F off
- Colorado City, AZ 56°F · 0.0°F off
- Cullowhee, NC 56°F · 0.0°F off
- Eldon, MO 56°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (65.4" here), excluding temperature-peer places.
- Jeanerette, LA 65.5" · 0.0" off
- Houma, LA 65.4" · 0.0" off
- Coos Bay, OR 65.3" · 0.1" off
- Franklin, LA 65.3" · 0.2" off
Data-derived climate profile
How Richardson GR State Park's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Richardson GR State Park, at 3,734 degree days versus 494 for cooling. Unlike a strongly continental record, however, its 26.6°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
The frost-free window extends for about 266 days. That is a long calendar measure, but it is not a forecast and does not combine heat, rainfall, soil, or local elevation into a planting recommendation.
Richardson GR State Park's 26.6°F seasonal spread is compact even though precipitation is abundant. August and December mark the typical warm and cold ends of the calendar. The annual average is 56°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Richardson GR State Park carries 65.4 inches of precipitation in a normal year, inside PlainClimate's wet range. Recorded annual snowfall is negligible. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Richardson GR State Park'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 Richardson GR State Park, not an official NOAA class or a year-ahead forecast.
Questions about Richardson GR State Park's climate
How much rain does Richardson GR State Park get? ▼
How many days above 90°F does Richardson GR State Park get? ▼
How much energy does heating and cooling require in Richardson GR State Park? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Richardson GR State Park's primary station: RICHARDSON GR SP (USC00047404). 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 Richardson GR State Park; 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 Richardson GR State Park 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.