West Covina climate
West Covina (California, United States) has a hot semi-arid climate (Köppen BSh). The average temperature over the year is 19 °C67 °F, and about 331 mm13 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
West Covina climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 1966 | 948 | 1457 | 732.9 |
| Feb | 1966 | 948 | 1457 | 753.0 |
| Mar | 2170 | 1050 | 1660 | 421.7 |
| Apr | 2373 | 1152 | 1762 | 190.7 |
| May | 2577 | 1356 | 1967 | 90.3 |
| Jun | 2883 | 1661 | 2272 | 10.0 |
| Jul | 3188 | 1966 | 2577 | 20.1 |
| Aug | 3289 | 2067 | 2678 | 10.0 |
| Sep | 3188 | 1966 | 2577 | 30.1 |
| Oct | 2781 | 1560 | 2170 | 170.7 |
| Nov | 2373 | 1253 | 1763 | 251.0 |
| Dec | 1966 | 947 | 1456 | 652.6 |
| Year | 3289 | 947 | 1967 | 33113 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 59% | 44% | 3.3 | 10:07 |
| Feb | 63% | 40% | 4.2 | 10:55 |
| Mar | 64% | 35% | 5.6 | 11:53 |
| Apr | 63% | 30% | 6.9 | 12:00 |
| May | 62% | 23% | 7.8 | 13:55 |
| Jun | 57% | 15% | 8.4 | 14:25 |
| Jul | 52% | 20% | 7.9 | 14:13 |
| Aug | 49% | 16% | 7.4 | 13:25 |
| Sep | 50% | 14% | 6.3 | 12:20 |
| Oct | 52% | 23% | 4.9 | 11:16 |
| Nov | 52% | 33% | 3.7 | 10:20 |
| Dec | 58% | 43% | 2.9 | 9:54 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of West Covina is like
The warmest month is August, with an average high of 32 °C89 °F and a low of 20 °C67 °F. The coldest is December, when highs average 19 °C66 °F and lows 9 °C47 °F. There is a clear seasonal cycle, with 12.1 °C21.8 °F between the average temperature of the warmest and the coolest month.
It is dry, with about 331 mm13 in of precipitation per year. The wettest three-month stretch is December–February, which brings 64% of the annual total. Months with less than 20 mm0.8 in on average: April–October. The wettest month is February (75 mm3.0 in), the driest is June (1 mm0.0 in).
Relative humidity ranges from 49% in August to 64% in March. The clearest skies (lowest average cloud amount, 14%) are typical of September. Average wind speed near the ground ranges from 6 km/h (4 mph) in August to 8 km/h (5 mph) in January. Daylight lasts from about 9.9 hours in December to 14.4 hours in June.
Best time to visit West Covina
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October–January and March–June: average highs of 19 °C66 °F to 28 °C83 °F with 1 mm0.0 in to 73 mm2.9 in of precipitation per month.
The most challenging month is August, which is hot, with average highs of 32 °C89 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for West Covina
- Winter (December–February) — highs around 19 °C66 °F, lows around 9 °C47 °F, about 71 mm2.8 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 2170 to 25 °C77 °F, lows 1050 to 13 °C56 °F, about 23 mm0.9 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 2883 to 32 °C89 °F, lows 1661 to 20 °C67 °F, about 1 mm0.0 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water.
- Autumn (September–November) — highs 2373 to 31 °C88 °F, lows 1253 to 19 °C66 °F, about 15 mm0.6 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
How West Covina compares
Compared with Anaheim, about 26 km to the south, West Covina is on average 0.4 °C0.8 °F cooler and receives a similar amount of precipitation.
Of the 222 places in the United States covered by World Climates, West Covina is the 47th warmest by annual mean temperature and the 198th wettest by annual precipitation. See all of them on the United States climate page.
Places in other countries with the most similar temperature and rainfall pattern (seasons shifted for the other hemisphere where needed): Viña del Mar (Chile, BSh), Nablus (Palestine, Csa) and Netanya (Israel, Csa).
Nearby places
- Anaheim 26 km · 20 °C67 °F · 331 mm13 in
- Los Angeles 28 km · 19 °C67 °F · 331 mm13 in
- Santa Ana 37 km · 17 °C63 °F · 311 mm12 in
- Long Beach 41 km · 20 °C68 °F · 331 mm13 in
- Riverside 52 km · 20 °C68 °F · 289 mm11 in
- San Bernardino 60 km · 19 °C67 °F · 289 mm11 in
- Santa Clarita 66 km · 19 °C66 °F · 341 mm13 in
- Lancaster 72 km · 17 °C63 °F · 286 mm11 in
Frequently asked questions
What is the warmest month in West Covina?
August is the warmest month in West Covina, with an average high of 32 °C (89 °F) and an average low of 20 °C (67 °F).
What is the coldest month in West Covina?
December is the coldest month, with an average high of 19 °C (66 °F) and an average low of 9 °C (47 °F).
When does it rain the most in West Covina?
February is the wettest month with about 75 mm (3.0 in) of precipitation; June is the driest with about 1 mm (0.0 in).
What is the best time to visit West Covina?
Judging by long-term averages, the most comfortable months are October–January and March–June.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 395 m, while West Covina lies at about 117 m. Temperatures on this page were therefore adjusted by +1.8 °C3.3 °F using the standard lapse rate of 6.5 °C per 1,000 m.