Chula Vista, California climate: Normal weather by month, frost dates and records
Chula Vista's normal year runs from 46°F December nights to 77°F August afternoons, with 9.2 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.4°C, December lows of 8°C, August highs of 25°C, 234 mm of precipitation a year.
- NOAA stationChula Vista
- Station IDUSC00041758
- Location32.64°N 117.09°W
- Elevation56 ft (17 m)
- From the center4 miles
- Population278,546
On October 23, the normal high in Chula Vista is 75°F and the normal low 57°F, and the chance of measurable rain or snow is 5%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Chula Vista.
- Jan 68° 47°
- Feb 67° 48°
- Mar 67° 51°
- Apr 68° 54°
- May 69° 58°
- Jun 71° 61°
- Jul 75° 65°
- Aug 77° 66°
- Sep 77° 64°
- Oct 75° 59°
- Nov 71° 51°
- Dec 67° 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 in Chula Vista each month?
August is the warmest month, with normal highs of 77°F; December the coldest, with normal lows of 46°F. The most precipitation falls in February (2.33 in), the least in August (0.01 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 68°F | 47°F | 57.0°F | 1.82 | 5 | <1 | <1 | 10 h 10 min |
| February | 67°F | 48°F | 57.5°F | 2.33 | 7 | <1 | <1 | 11 h |
| March | 67°F | 51°F | 59.2°F | 1.39 | 5 | <1 | <1 | 12 h |
| April | 68°F | 54°F | 61.0°F | 0.67 | 3 | <1 | <1 | 13 h |
| May | 69°F | 58°F | 63.4°F | 0.27 | 1 | <1 | <1 | 13 h 50 min |
| June | 71°F | 61°F | 66.1°F | 0.05 | <1 | <1 | <1 | 14 h 20 min |
| July | 75°F | 65°F | 69.7°F | 0.06 | <1 | <1 | <1 | 14 h 10 min |
| August | 77°F | 66°F | 71.3°F | 0.01 | <1 | 1 | <1 | 13 h 20 min |
| September | 77°F | 64°F | 70.6°F | 0.09 | 1 | 2 | <1 | 12 h 30 min |
| October | 75°F | 59°F | 66.7°F | 0.36 | 1 | 2 | <1 | 11 h 30 min |
| November | 71°F | 51°F | 61.0°F | 0.57 | 3 | 1 | <1 | 10 h 30 min |
| December | 67°F | 46°F | 56.2°F | 1.58 | 5 | <1 | <1 | 10 h |
| Year (annual) | 71°F | 56°F | 63.3°F | 9.20 | 33 | 5 | <1 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 20°C | 8°C | 13.9°C | 46 mm |
| February | 19°C | 9°C | 14.2°C | 59 mm |
| March | 19°C | 11°C | 15.1°C | 35 mm |
| April | 20°C | 12°C | 16.1°C | 17 mm |
| May | 21°C | 14°C | 17.4°C | 7 mm |
| June | 22°C | 16°C | 18.9°C | 1 mm |
| July | 24°C | 18°C | 20.9°C | 2 mm |
| August | 25°C | 19°C | 21.8°C | 0 mm |
| September | 25°C | 18°C | 21.4°C | 2 mm |
| October | 24°C | 15°C | 19.3°C | 9 mm |
| November | 22°C | 11°C | 16.1°C | 14 mm |
| December | 19°C | 8°C | 13.4°C | 40 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00041758; 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.
When is the best weather to visit Chula Vista?
Every month's normal high in Chula Vista 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 USC00041758.
What hardiness zone is each Chula Vista ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Chula Vista's 6 ZIP code areas are all in zone 10b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Chula Vista?
In a normal year in Chula Vista, 5 days a year reach 90°F, nights almost never fall to freezing and 33 days bring measurable precipitation.
- Days at 90°F or more
- 5a normal year
- Days at 100°F or more
- fewer than 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
- 33a normal year
The highest temperature in this station's record (since 1918) is 106°F, on October 3, 1987; the lowest is 26°F, on January 4, 1949.
The wettest calendar year on that record is 1941, with 24.85 in.
Source: NOAA NCEI 1991-2020 annual normals, station USC00041758; records: ACIS (NOAA Regional Climate Centers), station USC00041758. Records use complete months only; a month missing more than three days is left out.
How sunny is Chula Vista?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Chula Vista, 4.9 kWh per square metre a day. November is the sunniest month (83%) and June the cloudiest (69%). Among the 459 U.S. places of 50,000 or more, that ranks tied 176th (with 33 others) in sunshine.
| 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 much heating and cooling does Chula Vista need?
A normal year in Chula Vista brings 1,305 heating degree days, 76% fewer than the median U.S. place (5,373), and 701 cooling degree days, 23% fewer than the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 4,876 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 250 | 2 |
| February | 212 | 3 |
| March | 186 | 6 |
| April | 131 | 9 |
| May | 69 | 21 |
| June | 17 | 50 |
| July | 1 | 146 |
| August | 1 | 197 |
| September | 4 | 171 |
| October | 26 | 78 |
| November | 137 | 17 |
| December | 272 | 1 |
| Year (annual) | 1,305 | 701 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00041758. 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.
Has Chula Vista been warmer than normal lately?
2025 averaged 64.3°F, 1.0°F above the 1991-2020 normal of 63.3°F. 2 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 62.9°F | −0.4°F | 7.57 |
| 2022 | 63.8°F | +0.5°F | 5.50 |
| 2023 | 62.8°F | −0.5°F | 15.44 |
| 2024 | 63.0°F | −0.3°F | 8.29 |
| 2025 | 64.3°F | +1.0°F | 8.48 |
Over 58 complete years from 1919 to 2025, the station's annual mean temperature rose at a fitted 3.2°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 USC00041758; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Chula Vista's climate compare?
Chula Vista is warmer than 155 of the other 218 places with their own NOAA record in California, and wetter than 36. Across the 7,247 U.S. stations with normals, its annual mean of 63.3°F is warmer than 84%.
In the Köppen classification computed from these normals, Chula Vista 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.
Which places near Chula Vista share this climate record?
4 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.
- National City, CAalso near: North Island Naval Air Station (6 mi, 63.9°F a year); San Diego (7 mi, 64.7°F a year)58,460 people · 2 mi N
- La Presa, CA36,669 people · 7 mi NE
- Lemon Grove, CA27,867 people · 7 mi NE
- Bonita, CA13,336 people · 5 mi NE
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 Chula Vista's climate
What is the coldest month in Chula Vista?
December, with a normal high of 67°F and a normal low of 46°F. The warmest is August (77°F by day, 66°F at night).
Does it snow in Chula Vista?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Chula Vista?
February, with 2.33 in of precipitation in a normal year; the driest is August with 0.01 in.
What plant hardiness zone is Chula Vista in?
The USDA's 2023 map puts Chula Vista in zone 10b across its 6 ZIP code areas (10b in 91910, the largest). By the same method at Chula Vista's NOAA station, the coldest night of a typical year reaches 36°F (17 years, 1991-2020): zone 10b.
Nearby and next
- Chula Vista in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- Imperial Beach, CA6 miles from this station, 62.3°F a year
- North Island Naval Air Station, CA8 miles from this station, 63.9°F a year
- San Diego, CA9 miles from this station, 64.7°F a year
- San Diego Seaworld, CA12 miles from this station, 61.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made