Fairmont, California climate: Climate normals at a NOAA weather station
Fairmont's normal year runs from 37°F December nights to 93°F August afternoons, with 15.8 inches of precipitation and 1 inch of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.7°C, December lows of 3°C, August highs of 34°C, 402 mm of precipitation a year.
- NOAA stationFairmont
- Station IDUSC00042941
- Location34.70°N 118.43°W
- Elevation3,060 ft (933 m)
On October 23, the normal high in Fairmont is 74°F and the normal low 51°F, and the chance of measurable rain or snow is 7%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Fairmont.
- Jan 56° 38°
- Feb 58° 39°
- Mar 63° 43°
- Apr 68° 46°
- May 76° 53°
- Jun 86° 62°
- Jul 92° 68°
- Aug 93° 68°
- Sep 88° 62°
- Oct 77° 53°
- Nov 65° 44°
- Dec 55° 37°
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 Fairmont each month?
August is the warmest month, with normal highs of 93°F; December the coldest, with normal lows of 37°F. The most precipitation falls in February (4.43 in), the least in August (0.04 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 56°F | 38°F | 46.9°F | 3.67 | 0.0 | 7 | <1 | 6 | 10 h |
| February | 58°F | 39°F | 48.6°F | 4.43 | 0.7 | 7 | <1 | 5 | 11 h |
| March | 63°F | 43°F | 52.9°F | 2.46 | 0.2 | 7 | <1 | 2 | 11 h 50 min |
| April | 68°F | 46°F | 57.2°F | 0.95 | 0.0 | 4 | <1 | 1 | 13 h |
| May | 76°F | 53°F | 64.5°F | 0.37 | 0.0 | 2 | 3 | <1 | 14 h |
| June | 86°F | 62°F | 73.7°F | 0.08 | 0.0 | 1 | 11 | <1 | 14 h 30 min |
| July | 92°F | 68°F | 79.9°F | 0.10 | 0.0 | 1 | 20 | <1 | 14 h 20 min |
| August | 93°F | 68°F | 80.5°F | 0.04 | 0.0 | <1 | 23 | <1 | 13 h 30 min |
| September | 88°F | 62°F | 75.0°F | 0.15 | 0.0 | 1 | 14 | <1 | 12 h 30 min |
| October | 77°F | 53°F | 64.8°F | 0.72 | 0.0 | 2 | 3 | <1 | 11 h 20 min |
| November | 65°F | 44°F | 54.1°F | 0.66 | 0.0 | 3 | <1 | 2 | 10 h 20 min |
| December | 55°F | 37°F | 46.0°F | 2.21 | 0.4 | 5 | <1 | 7 | 9 h 50 min |
| Year (annual) | 73°F | 51°F | 62.0°F | 15.84 | 1.3 | 39 | 74 | 24 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 13°C | 3°C | 8.3°C | 93 mm | 0 cm |
| February | 14°C | 4°C | 9.2°C | 113 mm | 2 cm |
| March | 17°C | 6°C | 11.6°C | 62 mm | 1 cm |
| April | 20°C | 8°C | 14.0°C | 24 mm | 0 cm |
| May | 24°C | 12°C | 18.1°C | 9 mm | 0 cm |
| June | 30°C | 17°C | 23.2°C | 2 mm | 0 cm |
| July | 33°C | 20°C | 26.6°C | 3 mm | 0 cm |
| August | 34°C | 20°C | 26.9°C | 1 mm | 0 cm |
| September | 31°C | 17°C | 23.9°C | 4 mm | 0 cm |
| October | 25°C | 12°C | 18.2°C | 18 mm | 0 cm |
| November | 18°C | 6°C | 12.3°C | 17 mm | 0 cm |
| December | 13°C | 3°C | 7.8°C | 56 mm | 1 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00042941; 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 Fairmont?
Normal highs sit between 65°F and 85°F in April, May and October. Of those, October has the fewest days with rain (2).
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 USC00042941.
When is the last frost at Fairmont?
In Fairmont, the last spring frost (32°F) comes after April 6 in half of years and after May 20 in one year in ten; the first autumn frost comes before November 29 in half of years and before November 5 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
- April 61 year in 10 after May 20; 9 in 10 after February 20
- First autumn frost, half of years before
- November 291 year in 10 before November 5; 9 in 10 before December 15
NOAA puts the median frost-free season at 236 days, and the season without a hard freeze (28°F) at 293 days.
A hard freeze (28°F) comes after February 25 in half of springs and before December 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Fairmont in zone 8b in ZIP code 93536, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 9a: the coldest night of a typical year reaches 24°F (23 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00042941; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Fairmont?
In a normal year in Fairmont, 74 days a year reach 90°F (11 of them 100°F or more), 24 nights fall to 32°F or colder and 39 days bring measurable precipitation.
- Days at 90°F or more
- 74a normal year
- Days at 100°F or more
- 11a normal year
- Nights at 32°F or colder
- 24a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 39a normal year
- Days with 1 inch of snow or more
- fewer than 1a normal year
The highest temperature in this station's record (since 1909) is 112°F, on August 14, 1910; the lowest is 0°F, on January 5, 1913.
The wettest calendar year on that record is 1978, with 36.63 in; the snowiest season is 1961–62, with 28.3 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00042941; records: ACIS (NOAA Regional Climate Centers), station USC00042941. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Fairmont?
Over a year 90% of the sunlight that would reach the ground under clear skies gets through the clouds at Fairmont, 5.7 kWh per square metre a day. August is the sunniest month (97%) and February the cloudiest (82%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 83% | 3.2 |
| February | 82% | 4.0 |
| March | 85% | 5.4 |
| April | 87% | 6.7 |
| May | 89% | 7.5 |
| June | 93% | 8.1 |
| July | 95% | 7.9 |
| August | 97% | 7.5 |
| September | 95% | 6.3 |
| October | 91% | 4.8 |
| November | 88% | 3.6 |
| December | 83% | 2.9 |
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 Fairmont record?
A normal year at Fairmont brings 2,872 heating degree days, 47% fewer than the median U.S. place (5,373), and 1,805 cooling degree days, 99% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,970 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 560 | 0 |
| February | 461 | 1 |
| March | 382 | 6 |
| April | 259 | 26 |
| May | 130 | 113 |
| June | 27 | 288 |
| July | 2 | 463 |
| August | 1 | 481 |
| September | 17 | 317 |
| October | 107 | 101 |
| November | 337 | 9 |
| December | 589 | 0 |
| Year (annual) | 2,872 | 1,805 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00042941. 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.
Have recent years at Fairmont been warmer than normal?
2025 averaged 62.5°F, 0.5°F above the 1991-2020 normal of 62.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 63.5°F | +1.5°F | 12.49 | – |
| 2022 | 62.3°F | +0.3°F | 9.84 | – |
| 2023 | 58.7°F | −3.3°F | 29.80 | – |
| 2024 | 62.8°F | +0.8°F | 16.01 | – |
| 2025 | 62.5°F | +0.5°F | 25.55 | – |
Over 70 complete years from 1927 to 2025, the station's annual mean temperature rose at a fitted 3.3°F per century (+0.18°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00042941; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Fairmont's climate compare?
Fairmont is warmer than 121 of the 219 places with their own NOAA record in California, and wetter than 110. Across the 7,247 U.S. stations with normals, its annual mean of 62.0°F is warmer than 80%.
In the Köppen classification computed from these normals, Fairmont is Csa: temperate, dry-summer, hot 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 Fairmont share this climate record?
5 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.
- Agua Dulce, CA2,768 people · 15 mi SE
- Elizabeth Lake, CA1,677 people · 4 mi SE
- Leona Valley, CA1,559 people · 10 mi SE
- Lake Hughes, CA875 people · 2 mi SW
- Green Valley, CA808 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 Fairmont's climate
What is the coldest month at Fairmont?
December, with a normal high of 55°F and a normal low of 37°F. The warmest is August (93°F by day, 68°F at night).
Does it snow at Fairmont?
Yes: 1 inch in a normal year, falling on 0 days with 0.1 inch or more, the most in February (0.7 inches).
What is the rainiest month at Fairmont?
February, with 4.43 in of precipitation in a normal year; the driest is August with 0.04 in.
What plant hardiness zone is Fairmont in?
The USDA's 2023 map puts Fairmont in zone 8b in ZIP code 93536, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 24°F (23 years, 1991-2020): zone 9a.
How late can frost come at Fairmont?
In half of years the last 32°F night comes after April 6; in one year in ten it comes after May 20. Waiting until May 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Lancaster, CA12 miles from this station, 62.1°F a year
- Sandberg, CA17 miles from this station, 58.7°F a year
- Palmdale, CA21 miles from this station, 62.6°F a year
- Stevenson Ranch, CA24 miles from this station, 65.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made