Grant Grove, 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 Grant Grove's primary NOAA station, GRANT GROVE.
The climate verdict for Grant Grove
Grant Grove, California has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 48°F. At 54/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 31% of scores.
- 48°F
- annual average temperature (NOAA normal)
- 54/100
- comfort score, above 31% of station-mapped location scores
- 41.7"
- annual precipitation · 186" snow
- 128 days
- frost-free growing season
Grant Grove: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00043551 · Grant Grove, CA 48°F mean · 41.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 48°F
- RANK-COOL #2,127
- PHOTO-FINISH ≈ Lake Spaulding
- PRCP-MID 41.7"
- SWING-MID 30°F
- COMF-LOW 54/100
- LOAD-HEAT 6,348 HDD
- STN-1 USC00043551
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Lake Spaulding, CA (+ 0.1 °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.
- Grant Grove (this station) 48°F
- Cold Parkdale, OR 48°F
- Hot Carson Fish Hat…, WA 48°F
- Near Lake Spaulding, CA 48°F
- Near Frost, WV 48°F
Climate Living Index · Grant Grove
Grant Grove: 35/100 · grade F
Grant Grove publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Grant Grove, not an official NOAA rating. Rankings still use Comfort Score 54/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 41.7 in · 6.7 from 35 in | 76/100 · B |
| Normal heat + freeze calendar | 162 calendar days | 38/100 · F |
| Annual temperature balance | 48.0°F · 19.5° from 67.5°F | 32/100 · F |
| Frost-free season | 128 days/year | 11/100 · F |
| Snowfall burden | 186.0 inches/year | 0/100 · F |
Grant Grove · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Grant Grove is a temperate Köppen climate: Csb
Coldest-month mean 35.4°F and warmest-month mean 65.6°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
- 65.6°F
- Coldest month
- 35.4°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 Grant Grove sits across the climate record
Three NOAA fields for Grant Grove's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 31st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 62nd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 90%
- Warmest-to-coldest month gap for Grant Grove is compact versus 6,861 complete station-years.
How Grant Grove compares across U.S. station-mapped locations
Grant Grove's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 31st percentile score exceeds 31% 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%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 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 | 46°F (8°C) | 26°F (-4°C) | 36°F (2°C) | 8.0" | 37.7" | 22.4 | 0.0 |
| February | 46°F (8°C) | 25°F (-4°C) | 36°F (2°C) | 7.3" | 44.8" | 21.6 | 0.0 |
| March | 48°F (9°C) | 27°F (-3°C) | 38°F (3°C) | 7.8" | 35.1" | 21.2 | 0.0 |
| April | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | 3.6" | 20.0" | 18.0 | 0.0 |
| May | 60°F (15°C) | 38°F (3°C) | 49°F (9°C) | 1.4" | 4.9" | 7.6 | 0.0 |
| June | 71°F (22°C) | 46°F (8°C) | 58°F (15°C) | 0.5" | 0.6" | 1.5 | 0.0 |
| July | 79°F (26°C) | 53°F (11°C) | 66°F (19°C) | 0.3" | 0.0" | 0.0 | 0.2 |
| August | 79°F (26°C) | 52°F (11°C) | 65°F (19°C) | 0.2" | 0.0" | 0.0 | 0.1 |
| September | 73°F (23°C) | 47°F (9°C) | 60°F (16°C) | 0.3" | 0.0" | 0.8 | 0.0 |
| October | 63°F (17°C) | 39°F (4°C) | 51°F (10°C) | 2.4" | 3.5" | 6.0 | 0.0 |
| November | 53°F (11°C) | 32°F (0°C) | 42°F (6°C) | 3.3" | 8.6" | 14.4 | 0.0 |
| December | 46°F (8°C) | 25°F (-4°C) | 35°F (2°C) | 6.6" | 30.8" | 23.2 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 80°F around July 23, short of 90°F on every date, while 162 dates carry a normal low at or below freezing, the coldest 25°F near February 11.
The freezing stretch
The normal low stays at or below 32°F into April 25, then returns to freezing around November 16, covering 162 dates in all.
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 February 20, when 38% of years recorded at least a hundredth of an inch. The driest is August 10 at 3%. Summed across the calendar, that is about 65 wet dates a year.
The widest day
July 15 carries the biggest normal gap between afternoon and dawn, 26°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Grant Grove.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 37.7"
8.7 days with precipitation
Snow: 44.8"
10.5 days with precipitation
Snow: 35.1"
9.5 days with precipitation
Snow: 20.0"
7.5 days with precipitation
Snow: 4.9"
4.6 days with precipitation
Snow: 0.6"
1.9 days with precipitation
1.2 days with precipitation
0.9 days with precipitation
1.8 days with precipitation
Snow: 3.5"
3.7 days with precipitation
Snow: 8.6"
5.7 days with precipitation
Snow: 30.8"
8.2 days with precipitation
Grant Grove'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 2%. 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 30.2°F seasonal spread.
- Wettest month
- January, 8.0"
- Driest month
- August, 0.2"
- Wettest three months
- January, March, February (56% 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 Grant Grove, it arrives in quantity
41.7" of precipitation falls across only about 64 wet days here, averaging 0.65 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 64 a year, 18% of all days
- Average depth per wet day
- 0.65 inches
- Most wet days
- February, about 11
- Fewest wet days
- August, about 1
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.
Winter brings real snow to Grant Grove
Grant Grove averages 186.0 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 41 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 186.0 inches of depth.
- Days recording measurable snow: about 41 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 45% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 7
50% probability date
Last Spring Freeze
June 1
50% probability date
Growing Season
128 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,348
Higher = more heating needed
Cooling Degree Days
188
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Grant Grove 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 (48°F here).
- Ames, IA 48°F · 0.0°F off
- Barrington, IL 48°F · 0.0°F off
- Billings, MT 48°F · 0.0°F off
- Boscobel, WI 48°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (41.7" here), excluding temperature-peer places.
- Ithaca, NY 41.7" · 0.0" off
- Lawrenceville, IL 41.7" · 0.0" off
- Marcus Hook, PA 41.6" · 0.0" off
- Sidney, OH 41.6" · 0.0" off
Snow and freeze rhythm
When cold and snow define Grant Grove
heating led · moderate · mid swing
Grant Grove's energy balance leans toward cold weather: 6,348 annual heating degree days against 188 for cooling. Its 30.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 128 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
-
1. Grant Grove coldest normal
December
The monthly mean of 35°F (2°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Grant Grove typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Grant Grove snow peak
February
Grant Grove averages 186.0 inches of snow a year, with February the snowiest month on the normals.
Questions about Grant Grove's climate
How much snow does Grant Grove get? ▼
How cold does Grant Grove get in winter? ▼
How much energy does heating and cooling require in Grant Grove? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Grant Grove's primary station: GRANT GROVE (USC00043551). 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 Grant Grove; 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 Grant Grove 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.