San Diego Montgomery Field, California climate: Climate normals at a NOAA weather station
San Diego Montgomery Field's normal year runs from 45°F December nights to 82°F August afternoons, with 11.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.8°C, December lows of 7°C, August highs of 28°C, 280 mm of precipitation a year.
- NOAA stationSan Diego Montgomery Field
- Station IDUSW00003131
- Location32.82°N 117.14°W
- Elevation417 ft (127 m)
On October 23, the normal high in San Diego Montgomery Field is 77°F and the normal low 56°F, and the chance of measurable rain or snow is 14%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for San Diego Montgomery Field.
- Jan 67° 46°
- Feb 67° 47°
- Mar 69° 50°
- Apr 71° 52°
- May 72° 57°
- Jun 75° 60°
- Jul 80° 64°
- Aug 82° 65°
- Sep 81° 64°
- Oct 78° 58°
- Nov 73° 50°
- Dec 67° 45°
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 San Diego Montgomery Field each month?
August is the warmest month, with normal highs of 82°F; December the coldest, with normal lows of 45°F. The most precipitation falls in February (2.65 in), the least in August (0.01 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 67°F | 46°F | 56.6°F | 2.32 | 7 | <1 | <1 | 10 h 10 min |
| February | 67°F | 47°F | 57.1°F | 2.65 | 8 | <1 | <1 | 11 h |
| March | 69°F | 50°F | 59.1°F | 1.63 | 7 | <1 | <1 | 12 h |
| April | 71°F | 52°F | 61.5°F | 0.77 | 5 | 1 | <1 | 13 h |
| May | 72°F | 57°F | 64.4°F | 0.28 | 3 | 1 | <1 | 13 h 50 min |
| June | 75°F | 60°F | 67.3°F | 0.06 | 1 | 1 | <1 | 14 h 20 min |
| July | 80°F | 64°F | 71.9°F | 0.07 | 1 | 2 | <1 | 14 h 10 min |
| August | 82°F | 65°F | 73.7°F | 0.01 | <1 | 3 | <1 | 13 h 20 min |
| September | 81°F | 64°F | 72.5°F | 0.17 | 1 | 4 | <1 | 12 h 30 min |
| October | 78°F | 58°F | 67.8°F | 0.54 | 4 | 3 | <1 | 11 h 30 min |
| November | 73°F | 50°F | 61.4°F | 0.91 | 6 | 1 | <1 | 10 h 30 min |
| December | 67°F | 45°F | 56.3°F | 1.61 | 7 | <1 | <1 | 10 h |
| Year (annual) | 74°F | 55°F | 64.1°F | 11.02 | 50 | 16 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 20°C | 8°C | 13.7°C | 59 mm |
| February | 20°C | 8°C | 13.9°C | 67 mm |
| March | 20°C | 10°C | 15.1°C | 41 mm |
| April | 22°C | 11°C | 16.4°C | 20 mm |
| May | 22°C | 14°C | 18.0°C | 7 mm |
| June | 24°C | 16°C | 19.6°C | 2 mm |
| July | 27°C | 18°C | 22.2°C | 2 mm |
| August | 28°C | 19°C | 23.2°C | 0 mm |
| September | 27°C | 18°C | 22.5°C | 4 mm |
| October | 25°C | 14°C | 19.9°C | 14 mm |
| November | 23°C | 10°C | 16.3°C | 23 mm |
| December | 20°C | 7°C | 13.5°C | 41 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003131; 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 San Diego Montgomery Field?
Every month's normal high in San Diego Montgomery Field falls between 65°F and 85°F.
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 USW00003131.
How hot and how cold does it get at San Diego Montgomery Field?
In a normal year in San Diego Montgomery Field, 16 days a year reach 90°F (1 of them 100°F or more), nights almost never fall to freezing and 50 days bring measurable precipitation.
- Days at 90°F or more
- 16a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- fewer than 1a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 50a normal year
The highest temperature in this station's record (since 1998) is 107°F, on September 27, 2010; the lowest is 30°F, on January 14, 2007.
The wettest calendar year on that record is 2010, with 20.12 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00003131; records: ACIS (NOAA Regional Climate Centers), station USW00003131. Records use complete months only; a month missing more than three days is left out.
How sunny is it at San Diego Montgomery Field?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds at San Diego Montgomery Field, 4.9 kWh per square metre a day. November is the sunniest month (83%) and June the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 83% | 3.3 |
| February | 82% | 4.1 |
| March | 81% | 5.2 |
| April | 81% | 6.1 |
| May | 74% | 6.1 |
| June | 69% | 5.9 |
| July | 75% | 6.1 |
| August | 80% | 6.1 |
| September | 82% | 5.3 |
| October | 81% | 4.3 |
| November | 83% | 3.4 |
| December | 82% | 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 San Diego Montgomery Field record?
A normal year at San Diego Montgomery Field brings 1,320 heating degree days, 75% fewer than the median U.S. place (5,373), and 1,019 cooling degree days, 12% more than the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 5,185 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 263 | 4 |
| February | 226 | 5 |
| March | 194 | 9 |
| April | 126 | 23 |
| May | 59 | 39 |
| June | 14 | 85 |
| July | 1 | 215 |
| August | 0 | 268 |
| September | 2 | 227 |
| October | 28 | 115 |
| November | 136 | 28 |
| December | 272 | 2 |
| Year (annual) | 1,320 | 1,019 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00003131. 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 San Diego Montgomery Field been warmer than normal?
2025 averaged 64.1°F, equal to the 1991-2020 normal of 64.1°F. 2 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.4°F | +0.3°F | 8.55 |
| 2022 | 65.2°F | +1.1°F | 5.67 |
| 2023 | 62.8°F | −1.3°F | 16.97 |
| 2025 | 64.1°F | at normal | 9.59 |
Source: observed years: ACIS, station USW00003131. A year counts only with all twelve months complete.
How does San Diego Montgomery Field's climate compare?
San Diego Montgomery Field is warmer than 167 of the 219 places with their own NOAA record in California, and wetter than 49. Across the 7,247 U.S. stations with normals, its annual mean of 64.1°F is warmer than 86%.
In the Köppen classification computed from these normals, San Diego Montgomery Field is BSk: cold semi-arid steppe. 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.
Questions about San Diego Montgomery Field's climate
What is the coldest month at San Diego Montgomery Field?
December, with a normal high of 67°F and a normal low of 45°F. The warmest is August (82°F by day, 65°F at night).
What is the rainiest month at San Diego Montgomery Field?
February, with 2.65 in of precipitation in a normal year; the driest is August with 0.01 in.
What plant hardiness zone is San Diego Montgomery Field in?
The USDA's 2023 map puts San Diego Montgomery Field in zone 10b in ZIP code 92123, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 35°F (22 years, 1991-2020): zone 10b.
Nearby and next
- California climateThe statewide normals and every place in the state
- San Diego Miramar Naval Air Station, CA4 miles from this station, 64.2°F a year
- San Diego, CA6 miles from this station, 64.7°F a year
- San Diego Seaworld, CA6 miles from this station, 61.7°F a year
- North Island Naval Air Station, CA9 miles from this station, 63.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made