Eagle Mountain, California climate: Climate normals at a NOAA weather station
Eagle Mountain's normal year runs from 46°F December nights to 104°F July afternoons, with 3.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 23.1°C, December lows of 8°C, July highs of 40°C, 93 mm of precipitation a year.
- NOAA stationEagle Mountain
- Station IDUSC00042598
- Location33.81°N 115.45°W
- Elevation973 ft (297 m)
On October 23, the normal high in Eagle Mountain is 83°F and the normal low 63°F, and the chance of measurable rain or snow is 4%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Eagle Mountain.
- Jan 64° 46°
- Feb 68° 49°
- Mar 75° 55°
- Apr 82° 60°
- May 90° 69°
- Jun 99° 78°
- Jul 104° 83°
- Aug 103° 83°
- Sep 97° 76°
- Oct 86° 65°
- Nov 73° 54°
- Dec 63° 46°
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 Eagle Mountain each month?
July is the warmest month, with normal highs of 104°F; December the coldest, with normal lows of 46°F. The most precipitation falls in December (0.62 in), the least in June (0.01 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 64°F | 46°F | 55.2°F | 0.59 | 3 | <1 | <1 | 10 h 10 min |
| February | 68°F | 49°F | 58.4°F | 0.60 | 3 | <1 | <1 | 11 h |
| March | 75°F | 55°F | 64.5°F | 0.40 | 2 | 1 | <1 | 11 h 50 min |
| April | 82°F | 60°F | 70.9°F | 0.07 | 1 | 6 | <1 | 13 h |
| May | 90°F | 69°F | 79.5°F | 0.07 | <1 | 18 | <1 | 13 h 50 min |
| June | 99°F | 78°F | 88.6°F | 0.01 | <1 | 28 | <1 | 14 h 20 min |
| July | 104°F | 83°F | 93.6°F | 0.28 | 1 | 31 | <1 | 14 h 10 min |
| August | 103°F | 83°F | 92.6°F | 0.41 | 2 | 31 | <1 | 13 h 30 min |
| September | 97°F | 76°F | 86.7°F | 0.36 | 2 | 27 | <1 | 12 h 30 min |
| October | 86°F | 65°F | 75.3°F | 0.13 | 1 | 11 | <1 | 11 h 20 min |
| November | 73°F | 54°F | 63.3°F | 0.11 | 1 | <1 | <1 | 10 h 30 min |
| December | 63°F | 46°F | 54.3°F | 0.62 | 2 | <1 | <1 | 10 h |
| Year (annual) | 84°F | 64°F | 73.6°F | 3.65 | 17 | 152 | 1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 18°C | 8°C | 12.9°C | 15 mm |
| February | 20°C | 9°C | 14.7°C | 15 mm |
| March | 24°C | 13°C | 18.1°C | 10 mm |
| April | 28°C | 16°C | 21.6°C | 2 mm |
| May | 32°C | 21°C | 26.4°C | 2 mm |
| June | 37°C | 25°C | 31.4°C | 0 mm |
| July | 40°C | 29°C | 34.2°C | 7 mm |
| August | 39°C | 28°C | 33.7°C | 10 mm |
| September | 36°C | 25°C | 30.4°C | 9 mm |
| October | 30°C | 18°C | 24.1°C | 3 mm |
| November | 23°C | 12°C | 17.4°C | 3 mm |
| December | 17°C | 8°C | 12.4°C | 16 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00042598; 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 Eagle Mountain?
Normal highs sit between 65°F and 85°F in February, March, April and November. Of those, April 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 USC00042598.
When is the last frost at Eagle Mountain?
A night at 32°F or colder comes in only 13% of years in Eagle Mountain (NOAA). NOAA's median date of the last spring frost is January 10 and of the first autumn frost January 8.
NOAA puts the median frost-free season at 365 days, and the season without a hard freeze (28°F) at 365 days.
The USDA's 2023 Plant Hardiness Zone Map puts Eagle Mountain in zone 10a in ZIP code 92239, 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 10a: the coldest night of a typical year reaches 35°F (20 complete years).
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00042598; 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 Eagle Mountain?
In a normal year in Eagle Mountain, 152 days a year reach 90°F (88 of them 100°F or more), 1 night falls to 32°F or colder and 17 days bring measurable precipitation.
- Days at 90°F or more
- 152a normal year
- Days at 100°F or more
- 88a normal year
- Nights at 32°F or colder
- 1a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 17a normal year
The highest temperature in this station's record (since 1933) is 120°F, on June 26, 1970; the lowest is 20°F, on January 22, 1937.
The wettest calendar year on that record is 1983, with 12.88 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00042598; records: ACIS (NOAA Regional Climate Centers), station USC00042598. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Eagle Mountain?
Over a year 94% of the sunlight that would reach the ground under clear skies gets through the clouds at Eagle Mountain, 5.9 kWh per square metre a day. June is the sunniest month (97%) and December the cloudiest (87%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 88% | 3.5 |
| February | 89% | 4.5 |
| March | 92% | 5.9 |
| April | 94% | 7.3 |
| May | 96% | 8.2 |
| June | 97% | 8.5 |
| July | 94% | 7.8 |
| August | 95% | 7.3 |
| September | 96% | 6.3 |
| October | 95% | 5.0 |
| November | 91% | 3.8 |
| December | 87% | 3.1 |
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 Eagle Mountain record?
A normal year at Eagle Mountain brings 1,071 heating degree days, 80% fewer than the median U.S. place (5,373), and 4,237 cooling degree days, 4.7 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 8,684 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 305 | 1 |
| February | 197 | 12 |
| March | 94 | 80 |
| April | 24 | 199 |
| May | 3 | 451 |
| June | 0 | 708 |
| July | 0 | 888 |
| August | 0 | 857 |
| September | 0 | 652 |
| October | 8 | 327 |
| November | 111 | 61 |
| December | 331 | 1 |
| Year (annual) | 1,071 | 4,237 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00042598. 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 Eagle Mountain been warmer than normal?
Over 61 complete years from 1935 to 2015, the station's annual mean temperature rose at a fitted 5.2°F per century (+0.29°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Eagle Mountain's climate compare?
Eagle Mountain is warmer than 212 of the 219 places with their own NOAA record in California, and wetter than 7. Across the 7,247 U.S. stations with normals, its annual mean of 73.6°F is warmer than 98%.
In the Köppen classification computed from these normals, Eagle Mountain is BWh: hot desert. 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 Eagle Mountain share this climate record?
Desert Center has no NOAA station with 1991-2020 normals of its 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.
- Desert Center, CA167 people · 7 mi SE
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 Eagle Mountain's climate
What is the coldest month at Eagle Mountain?
December, with a normal high of 63°F and a normal low of 46°F. The warmest is July (104°F by day, 83°F at night).
Does it snow at Eagle Mountain?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month at Eagle Mountain?
December, with 0.62 in of precipitation in a normal year; the driest is June with 0.01 in.
What plant hardiness zone is Eagle Mountain in?
The USDA's 2023 map puts Eagle Mountain in zone 10a in ZIP code 92239, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 35°F (20 years, 1991-2020): zone 10a.
Nearby and next
- California climateThe statewide normals and every place in the state
- Hayfield Pumping Plant, CA12 miles from this station, 70.6°F a year
- Chiriaco Summit, CA19 miles from this station, 69.4°F a year
- Iron Mountain, CA30 miles from this station, 75.2°F a year
- Mecca, CA39 miles from this station, 74.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made