Summit forecast, next 72 hours
- New snow0 in
- Strongest gusts35 mphSaturday
- Coldest69°F
| Forecast | Snow | Gusts | Temp °F |
|---|---|---|---|
| This AfternoonSunny | 0 in | 10 mph | High 85° |
| TonightMostly Clear | 0 in | 15 mph | Low 67° |
| SaturdaySunny | 0 in | 35 mph | High 84° |
| Saturday NightMostly Clear | 0 in | 30 mph | Low 66° |
| SundaySunny | 0 in | 20 mph | High 85° |
| Sunday NightClear | 0 in | 15 mph | Low 68° |
Snow is the forecast new accumulation at the summit grid point. Dots use Road Travel’s driving-risk scale.
Typical weather by month
Monthly normals from the long-term stations nearest the summit. None sits exactly on the pass, so each column says how far away and how high it is.
| Month | Lake Arrowhead 5,205 ft · 16 mi southeast of the summit | Hesperia 3,055 ft · 11 mi northeast of the summit | |
|---|---|---|---|
| High / low °F | Snow (in) | High / low °F | |
| Jan | 44° / 29° | 3.0 | 60° / 37° |
| Feb | 45° / 30° | 5.3 | 62° / 39° |
| Mar | 52° / 32° | 6.7 | 69° / 42° |
| Apr | 60° / 36° | 2.8 | 75° / 46° |
| May | 67° / 41° | 0.8 | 82° / 53° |
| Jun | 76° / 49° | 0 | 92° / 59° |
| Jul | 81° / 57° | 0 | 97° / 65° |
| Aug | 82° / 57° | 0 | 97° / 65° |
| Sep | 74° / 52° | 0 | 91° / 61° |
| Oct | 63° / 43° | 0 | 81° / 51° |
| Nov | 52° / 34° | 0.3 | 67° / 42° |
| Dec | 43° / 29° | 3.5 | 59° / 35° |
NOAA NCEI U.S. Climate Normals, 1991–2020: LAKE ARROWHEAD (USC00044671, 5,205 ft); HESPERIA 2E (USC00043937, 3,055 ft). Snow days are days with at least 1 inch of new snow. “—” means the station does not publish that normal.
Cameras, road reports and winter rules
Conditions on the pass change by the hour, so these go straight to the official sources.
- For this passCaltrans I-15 highway conditions
- California · CaltransQuickMap conditions and cameras
- California · winter rulesChain controls
Check the official National Weather Service forecast for the summit and the road report before you leave.
Crossing Cajon Pass? See the summit at the hour you’ll be there
Road Travel times the forecast to your drive, so you see conditions at the summit when you will actually reach it, and get alerts about weather ahead on the way.
Questions about Cajon Pass
How high is Cajon Pass?
I-15 crosses at Cajon Summit, 4,190 ft above sea level.
How far is Cajon Pass from San Bernardino and Hesperia?
By road, the summit is 24 miles from San Bernardino, CA and 11 miles from Hesperia, CA.
How cold does it get near Cajon Pass?
The coldest month is December. Hesperia (3,055 ft, 11 mi northeast of the summit) averages a low of 35°F then (1991–2020 normals); the summit is 1,135 ft higher.