Grant Grove, California climate: Climate normals at a NOAA weather station
Grant Grove's normal year runs from 25°F December nights to 79°F July afternoons, with 41.7 inches of precipitation and 186 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.9°C, December lows of −4°C, July highs of 26°C, 1,058 mm of precipitation a year.
- NOAA stationGrant Grove
- Station IDUSC00043551
- Location36.74°N 118.96°W
- Elevation6,580 ft (2,006 m)
On October 23, the normal high in Grant Grove is 60°F and the normal low 37°F, and the chance of measurable rain or snow is 13%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grant Grove.
- Jan 46° 26°
- Feb 46° 25°
- Mar 48° 27°
- Apr 52° 30°
- May 60° 38°
- Jun 71° 46°
- Jul 79° 53°
- Aug 79° 52°
- Sep 73° 47°
- Oct 63° 39°
- Nov 53° 32°
- Dec 46° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Grant Grove each month?
July is the warmest month, with normal highs of 79°F; December the coldest, with normal lows of 25°F. The most precipitation falls in January (8.03 in), the least in August (0.16 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 46°F | 26°F | 35.9°F | 8.03 | 37.7 | 9 | <1 | 22 | 9 h 50 min |
| February | 46°F | 25°F | 35.5°F | 7.33 | 44.8 | 11 | <1 | 22 | 10 h 50 min |
| March | 48°F | 27°F | 37.8°F | 7.81 | 35.1 | 10 | <1 | 21 | 11 h 50 min |
| April | 52°F | 30°F | 41.0°F | 3.58 | 20.0 | 8 | <1 | 18 | 13 h 10 min |
| May | 60°F | 38°F | 48.7°F | 1.37 | 4.9 | 5 | <1 | 8 | 14 h 10 min |
| June | 71°F | 46°F | 58.2°F | 0.53 | 0.6 | 2 | <1 | 2 | 14 h 40 min |
| July | 79°F | 53°F | 65.6°F | 0.27 | 0.0 | 1 | <1 | <1 | 14 h 30 min |
| August | 79°F | 52°F | 65.4°F | 0.16 | 0.0 | 1 | <1 | <1 | 13 h 40 min |
| September | 73°F | 47°F | 60.1°F | 0.32 | 0.0 | 2 | <1 | 1 | 12 h 30 min |
| October | 63°F | 39°F | 50.7°F | 2.37 | 3.5 | 4 | <1 | 6 | 11 h 20 min |
| November | 53°F | 32°F | 42.2°F | 3.26 | 8.6 | 6 | <1 | 14 | 10 h 10 min |
| December | 46°F | 25°F | 35.4°F | 6.63 | 30.8 | 8 | <1 | 23 | 9 h 40 min |
| Year (annual) | 59°F | 37°F | 48.0°F | 41.66 | 186.0 | 64 | <1 | 137 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −4°C | 2.2°C | 204 mm | 96 cm |
| February | 8°C | −4°C | 1.9°C | 186 mm | 114 cm |
| March | 9°C | −3°C | 3.2°C | 198 mm | 89 cm |
| April | 11°C | −1°C | 5.0°C | 91 mm | 51 cm |
| May | 15°C | 3°C | 9.3°C | 35 mm | 12 cm |
| June | 22°C | 8°C | 14.6°C | 13 mm | 2 cm |
| July | 26°C | 11°C | 18.7°C | 7 mm | 0 cm |
| August | 26°C | 11°C | 18.6°C | 4 mm | 0 cm |
| September | 23°C | 9°C | 15.6°C | 8 mm | 0 cm |
| October | 17°C | 4°C | 10.4°C | 60 mm | 9 cm |
| November | 11°C | 0°C | 5.7°C | 83 mm | 22 cm |
| December | 8°C | −4°C | 1.9°C | 168 mm | 78 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00043551; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Grant Grove?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August has the fewest days with rain (1).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00043551.
When is the last frost at Grant Grove?
In Grant Grove, the last spring frost (32°F) comes after June 1 in half of years and after June 15 in one year in ten; the first autumn frost comes before October 7 in half of years and before September 19 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- June 11 year in 10 after June 15; 9 in 10 after May 11
- First autumn frost, half of years before
- October 71 year in 10 before September 19; 9 in 10 before October 30
NOAA puts the median frost-free season at 132 days, and the season without a hard freeze (28°F) at 158 days.
A hard freeze (28°F) comes after May 16 in half of springs and before October 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grant Grove in zone 7b in ZIP code 93633, the nearest ZIP area.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00043551; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Grant Grove?
In a normal year in Grant Grove, a 90°F day is rare, 137 nights fall to 32°F or colder and 64 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 137a normal year
- Days that stay below freezing
- 15high of 32°F or less
- Days with 0.01 inch of precipitation
- 64a normal year
- Days with 1 inch of snow or more
- 34a normal year
The highest temperature in this station's record (since 1940) is 91°F, on July 10, 2002; the lowest is −6°F, on January 10, 1949.
The wettest calendar year on that record is 1969, with 78.80 in; the snowiest season is 1951–52, with 411.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00043551; records: ACIS (NOAA Regional Climate Centers), station USC00043551. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Grant Grove?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds at Grant Grove, 5.4 kWh per square metre a day. August is the sunniest month (93%) and February the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 2.8 |
| February | 74% | 3.6 |
| March | 76% | 4.9 |
| April | 78% | 6.1 |
| May | 83% | 7.2 |
| June | 92% | 8.4 |
| July | 91% | 7.9 |
| August | 93% | 7.4 |
| September | 92% | 6.2 |
| October | 88% | 4.6 |
| November | 82% | 3.3 |
| December | 74% | 2.5 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Grant Grove record?
A normal year at Grant Grove brings 6,348 heating degree days, 18% more than the median U.S. place (5,373), and 188 cooling degree days, 79% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,819 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 901 | 0 |
| February | 826 | 0 |
| March | 845 | 0 |
| April | 720 | 0 |
| May | 507 | 1 |
| June | 222 | 18 |
| July | 56 | 76 |
| August | 55 | 67 |
| September | 172 | 23 |
| October | 445 | 2 |
| November | 684 | 0 |
| December | 916 | 0 |
| Year (annual) | 6,348 | 188 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00043551. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Grant Grove's climate compare?
Grant Grove is warmer than 11 of the 219 places with their own NOAA record in California, and wetter than 189. Across the 7,247 U.S. stations with normals, its annual mean of 48.0°F is warmer than 32%.
In the Köppen classification computed from these normals, Grant Grove is Csb: temperate, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Grant Grove share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Squaw Valley, CA3,584 people · 13 mi W
- Wilsonia, CA32 people · 0 mi SE
- Hartland, CA0 people · 6 mi S
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Grant Grove's climate
What is the coldest month at Grant Grove?
December, with a normal high of 46°F and a normal low of 25°F. The warmest is July (79°F by day, 53°F at night).
Does it snow at Grant Grove?
Yes: 186 inches in a normal year, falling on 41 days with 0.1 inch or more, the most in February (44.8 inches).
What is the rainiest month at Grant Grove?
January, with 8.03 in of precipitation in a normal year; the driest is August with 0.16 in.
What plant hardiness zone is Grant Grove in?
The USDA's 2023 map puts Grant Grove in zone 7b in ZIP code 93633, the nearest ZIP area.
How late can frost come at Grant Grove?
In half of years the last 32°F night comes after June 1; in one year in ten it comes after June 15. Waiting until June 15 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Balch Power House, CA14 miles from this station, 61.9°F a year
- Lodgepole, CA16 miles from this station, 42.7°F a year
- Ash Mountain, CA19 miles from this station, 63.5°F a year
- Three Rivers, CA20 miles from this station, 62.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made