The year at a glance
Averages from 30 years of climate history, 1991-2020
| Clayton | Metric | Oakley |
|---|---|---|
| 255 days | Sunny daysclear or partly cloudy skies | 263 days |
| 18 in | Precipitationper year | 18 in |
| 52 days | Wet daysrain or snow per year | 52 days |
| 0 in | Snowfallper year | 0 in |
| 52 days | Hot daysabove 90 °F | 65 days |
| 6 days | Freezing nightsat or below 32 °F | 6 days |
| 69% | Humidityaverage relative | 67% |
| 62 °F | Average temperatureyear round | 63 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clayton high | 57 | 62 | 67 | 72 | 78 | 85 | 89 | 89 | 86 | 78 | 66 | 58 |
| Oakley high | 56 | 61 | 67 | 72 | 79 | 86 | 91 | 90 | 87 | 78 | 65 | 56 |
| Clayton low | 41 | 44 | 47 | 49 | 53 | 57 | 59 | 59 | 58 | 53 | 46 | 41 |
| Oakley low | 40 | 44 | 47 | 49 | 54 | 59 | 61 | 60 | 59 | 54 | 46 | 40 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clayton | 3.7 | 3.8 | 2.8 | 1.3 | 0.7 | 0.1 | 0.0 | 0.1 | 0.1 | 0.8 | 1.7 | 3.3 |
| Oakley | 3.7 | 3.6 | 2.7 | 1.2 | 0.6 | 0.1 | 0.0 | 0.1 | 0.0 | 0.8 | 1.8 | 3.4 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clayton | 13 | 13 | 16 | 20 | 24 | 27 | 30 | 29 | 28 | 25 | 17 | 14 |
| Oakley | 13 | 14 | 17 | 20 | 25 | 27 | 30 | 30 | 29 | 26 | 18 | 15 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Clayton vs another city
- Clayton vs Concord, CA
- Clayton vs Pittsburg, CA
- Clayton vs Walnut Creek, CA
- Clayton vs Bay Point, CA
- Clayton vs Contra Costa Centre, CA
- Clayton vs Alamo, CA
- Clayton vs New York, NY
- Clayton vs Los Angeles, CA
- Clayton vs Chicago, IL
- Clayton vs Houston, TX
- Clayton vs Phoenix, AZ
- Clayton vs Philadelphia, PA
Oakley vs another city
- Oakley vs Brentwood, CA
- Oakley vs Antioch, CA
- Oakley vs Discovery Bay, CA
- Oakley vs Pittsburg, CA
- Oakley vs Rio Vista, CA
- Oakley vs New York, NY
- Oakley vs Los Angeles, CA
- Oakley vs Chicago, IL
- Oakley vs Houston, TX
- Oakley vs Phoenix, AZ
- Oakley vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).