The year at a glance
Averages from 30 years of climate history, 1991-2020
| Millbrae | Metric | San Bruno |
|---|---|---|
| 234 days | Sunny daysclear or partly cloudy skies | 234 days |
| 21 in | Precipitationper year | 21 in |
| 56 days | Wet daysrain or snow per year | 56 days |
| 0 in | Snowfallper year | 0 in |
| 3 days | Hot daysabove 90 °F | 2 days |
| 0 days | Freezing nightsat or below 32 °F | 0 days |
| 79% | Humidityaverage relative | 79% |
| 58 °F | Average temperatureyear round | 58 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Millbrae high | 58 | 61 | 63 | 65 | 68 | 70 | 71 | 72 | 74 | 71 | 64 | 58 |
| San Bruno high | 58 | 60 | 62 | 64 | 67 | 69 | 70 | 71 | 73 | 71 | 64 | 59 |
| Millbrae low | 45 | 46 | 47 | 49 | 51 | 53 | 54 | 55 | 55 | 53 | 49 | 45 |
| San Bruno low | 45 | 46 | 47 | 48 | 50 | 52 | 54 | 55 | 55 | 53 | 49 | 46 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Millbrae | 3.9 | 4.2 | 3.2 | 1.6 | 0.8 | 0.2 | 0.0 | 0.0 | 0.1 | 0.9 | 2.0 | 3.7 |
| San Bruno | 3.9 | 4.2 | 3.2 | 1.6 | 0.8 | 0.2 | 0.0 | 0.0 | 0.1 | 0.9 | 2.0 | 3.7 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Millbrae | 13 | 13 | 15 | 18 | 20 | 23 | 26 | 25 | 26 | 23 | 18 | 15 |
| San Bruno | 13 | 13 | 15 | 18 | 20 | 23 | 26 | 25 | 26 | 23 | 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.
Millbrae vs another city
- Millbrae vs Burlingame, CA
- Millbrae vs Hillsborough, CA
- Millbrae vs South San Francisco, CA
- Millbrae vs Pacifica, CA
- Millbrae vs San Mateo, CA
- Millbrae vs New York, NY
- Millbrae vs Los Angeles, CA
- Millbrae vs Chicago, IL
- Millbrae vs Houston, TX
- Millbrae vs Phoenix, AZ
- Millbrae vs Philadelphia, PA
San Bruno vs another city
- San Bruno vs Pacifica, CA
- San Bruno vs South San Francisco, CA
- San Bruno vs Burlingame, CA
- San Bruno vs Daly City, CA
- San Bruno vs Hillsborough, CA
- San Bruno vs New York, NY
- San Bruno vs Los Angeles, CA
- San Bruno vs Chicago, IL
- San Bruno vs Houston, TX
- San Bruno vs Phoenix, AZ
- San Bruno 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).