San Diego Miramar, CA Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from San Diego Miramar's primary NOAA station, SAN DIEGO MIRAMAR NAS.
The climate verdict for San Diego Miramar
Dryness leads the climate profile for San Diego Miramar, California, with 11.5 inches of precipitation a year. NOAA records an annual average of 64°F. August is the warmest month at 74°F and December the coldest at 56°F.
- 64°F
- annual average temperature (NOAA normal)
- 11.5"
- yearly precipitation total
San Diego Miramar: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00093107 · San Diego Miramar, CA 64°F mean · 11.5" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-ARID · SWING-NARROW · COMF-UNK · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 64°F
- RANK-UPPER #5,900
- PHOTO-FINISH ≈ Americus
- PRCP-ARID 11.5"
- SWING-NARROW 17°F
- COMF-UNK Comfort n/a
- LOAD-MIX H/C balanced
- STN-1 USW00093107
- BOOK-FULL 5/6 fields
Nearest mean-temperature peer: Americus, GA (+ 0 °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.
- San Diego Miram… (this station) 64°F
- Hot El Dorado S AR…, AR 64°F
- Near Americus, GA 64°F
- Near Childs, AZ 64°F
- Near Demopolis L&d, AL 64°F
Climate Living Index · San Diego Miramar
San Diego Miramar: 77/100 · grade B
San Diego Miramar publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for San Diego Miramar, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Annual temperature balance | 64.2°F · 3.3° from 67.5°F | 90/100 · A |
| Precipitation balance | 11.5 in · 23.5 from 35 in | 17/100 · F |
San Diego Miramar · 2026-08-04 · NOAA NCEI Climate Normals · method .
San Diego Miramar's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 73.8°F
- Coldest month
- 56.4°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 · balanced station
Where San Diego Miramar sits across the climate record
Three NOAA fields for San Diego Miramar's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 14% warmest
- Among 6,861 stations, San Diego Miramar sits in the warmer third of annual means.
- Annual precipitation
- Drier than 91%
- San Diego Miramar's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 98%
- Warmest-to-coldest month gap for San Diego Miramar is compact versus 6,861 complete station-years.
San Diego Miramar's measured station temperature trend
MethodologyAcross 52 complete annual observations from 1948 to 2025, SAN DIEGO MIRAMAR NAS warmed at a fitted rate of 0.37°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- San Diego Miramar primary station fitted change +0.37 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 67°F (20°C) | 47°F (8°C) | 57°F (14°C) | 2.3" | 0.2 | 0.1 |
| February | 67°F (20°C) | 48°F (9°C) | 58°F (14°C) | 2.7" | 0.0 | 0.3 |
| March | 68°F (20°C) | 50°F (10°C) | 59°F (15°C) | 1.6" | 0.0 | 0.4 |
| April | 70°F (21°C) | 52°F (11°C) | 61°F (16°C) | 0.8" | 0.0 | 1.0 |
| May | 72°F (22°C) | 57°F (14°C) | 64°F (18°C) | 0.3" | 0.0 | 1.0 |
| June | 75°F (24°C) | 60°F (16°C) | 68°F (20°C) | 0.1" | 0.0 | 1.0 |
| July | 80°F (27°C) | 64°F (18°C) | 72°F (22°C) | 0.1" | 0.0 | 2.1 |
| August | 82°F (28°C) | 65°F (18°C) | 74°F (23°C) | 0.0" | 0.0 | 4.6 |
| September | 82°F (28°C) | 63°F (17°C) | 72°F (22°C) | 0.1" | 0.0 | 5.0 |
| October | 78°F (25°C) | 58°F (14°C) | 68°F (20°C) | 0.6" | 0.0 | 3.7 |
| November | 72°F (22°C) | 51°F (10°C) | 62°F (16°C) | 0.9" | 0.0 | 1.2 |
| December | 67°F (19°C) | 46°F (8°C) | 56°F (14°C) | 2.0" | 0.1 | 0.0 |
The year, day by day
The calendar barely moves in San Diego Miramar: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 46°F near December 16 and 83°F near August 24.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 46°F around December 16.
Where the wet dates fall
The likeliest wet date is February 18, when 30% of years recorded at least a hundredth of an inch. The driest is August 11 at 2%. Summed across the calendar, that is about 51 wet dates a year.
The widest day
November 8 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for San Diego Miramar.
Where San Diego Miramar Stands Nationally
Aridity defines the water calendar: about 12 inches in a normal year lands this among the driest tenth of ranked stations.
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
San Diego Miramar earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
7.4 days with precipitation
9.0 days with precipitation
7.4 days with precipitation
4.2 days with precipitation
2.9 days with precipitation
0.9 days with precipitation
0.8 days with precipitation
0.3 days with precipitation
1.4 days with precipitation
3.1 days with precipitation
5.4 days with precipitation
8.2 days with precipitation
San Diego Miramar's wet season runs through the cold months
December, January and February carry 61% 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 an unusually narrow 17.4°F seasonal spread.
- Wettest month
- February, 2.7"
- Driest month
- August, 0.0"
- Wettest three months
- February, January, December (61% 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.
How San Diego Miramar's precipitation splits across the calendar
About 51 days a year record measurable precipitation here, carrying 11.5" between them, or roughly 0.23 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,311
Higher = more heating needed
Cooling Degree Days
1,033
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to San Diego Miramar 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 (64°F here).
- Americus, GA 64°F · 0.0°F off
- Florence, SC 64°F · 0.0°F off
- Fort Hancock, TX 64°F · 0.0°F off
- Lake City, SC 64°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (11.5" here), excluding temperature-peer places.
- Eagle, AK 11.5" · 0.0" off
- Manila, UT 11.5" · 0.0" off
- Cody, WY 11.5" · 0.0" off
- Grantsville, UT 11.6" · 0.1" off
Scarce-water calendar
Where San Diego Miramar's limited precipitation lands
mixed demand · dry · low swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 11.5 inches annually, within PlainClimate's dry band. Snowfall is not added to the interpretation because its annual value is missing. The monthly distribution matters because the total alone does not reveal the timing.
The calendar stays thermally compact and dry. August and December mark the typical warm and cold ends of the calendar, only 17.4°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 64°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
San Diego Miramar combines a compact 17.4°F annual temperature range with meaningful demand on both sides of the thermostat: 1,311 heating and 1,033 cooling degree days. The balance matters more here than either annual total in isolation.
A frost-free growing-season length is not available for San Diego Miramar. That missing field is kept separate from the observed temperature and precipitation record rather than filled from a regional estimate.
San Diego Miramar wettest normal
February
February concentrates the scarce annual total (11.5 inches).
San Diego Miramar driest normal
August
August is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about San Diego Miramar's climate
How dry is San Diego Miramar? ▼
How much energy does heating and cooling require in San Diego Miramar? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from San Diego Miramar's primary station: SAN DIEGO MIRAMAR NAS (USW00093107). 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 San Diego Miramar; 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 San Diego Miramar 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.