San Bernardino, CA Weather & Growing Conditions
Today
100°F
Sunny
Sunny, with a high near 100. Southwest wind 0 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 100°F | Sunny | 0 to 10 mph SW | 0% |
| Tonight | 70°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Wednesday | 99°F | Sunny | 0 to 10 mph S | 0% |
| Wednesday Night | 70°F | Mostly Clear | 0 to 10 mph S | 0% |
| Thursday | 102°F | Sunny | 0 to 5 mph SW | 2% |
| Thursday Night | 71°F | Mostly Clear | 0 to 5 mph W | 2% |
| Friday | 103°F | Sunny | 0 to 5 mph W | 1% |
| Friday Night | 72°F | Mostly Clear | 0 to 5 mph W | 1% |
| Saturday | 103°F | Sunny | 0 to 5 mph W | 1% |
| Saturday Night | 72°F | Mostly Clear | 0 to 5 mph SW | 1% |
| Sunday | 102°F | Sunny | 0 to 10 mph S | 2% |
| Sunday Night | 71°F | Mostly Clear | 0 to 10 mph SW | 1% |
| Monday | 98°F | Sunny | 0 to 10 mph SW | 5% |
| Monday Night | 68°F | Mostly Clear | 0 to 10 mph S | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Bernardino, CA
Last spring frost
May 5
First fall frost
Nov 2
Growing season
176 days
Hardiness zone
10a
Explore more for San Bernardino, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Lake Arrowhead, Ca (9.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.