Mount Wilson
Weather station · 34.2°N 118.1°W · 1745 m above sea level
ICAO KMWSStation data since 1948
Record high
35.6°C
in 2003
Record low
2.8°C
in 2007
Average high
25.0°C
all years on record
13.6°C short of the record for 23 September
Today’s high 22.0°C against 35.6°C in 2003. A reading that beats it is flagged here automatically, once a second cycle confirms it.
All-time record high
38.9°C
- Date
- Thursday, 5 July 2007
- Time of day
- Not recorded. The daily archive stores the day, not the hour.
- Location
- Mount Wilson, United States
- Position
- 34.23°N 118.06°W · 1745 m
Highest highest in available records since 1948. Source: NOAA GHCN-Daily.
All-time record low
−12.8°C
- Date
- Wednesday, 29 January 1969
- Time of day
- Not recorded. The daily archive stores the day, not the hour.
- Location
- Mount Wilson, United States
- Position
- 34.23°N 118.06°W · 1745 m
Highest and lowest lowest in available records since 1948. Source: NOAA GHCN-Daily.
Where Mount Wilson is
34.23°N 118.06°W
Every year on record
1948 to 2026
Annual average · °C
Trend over 64 years with data: +0.54 °C per decade
Source: NOAA GHCN-Daily. Years the station did not cover are left as gaps, never joined across. The dashed line is a least squares trend through the years that have data.
Records by month
Jan
25.0°
−12.8°
Feb
26.7°
−11.7°
Mar
28.3°
−10.0°
Apr
30.0°
−7.8°
May
33.3°
−5.6°
Jun
38.3°
−1.7°
Jul
38.9°
3.3°
Aug
38.3°
2.8°
Sep
36.7°
Recent days
| Day | High | At | Low | At |
|---|---|---|---|---|
| 2026-09-23 | 22.0°C | 00:10 UTC | 17.0°C | 02:20 UTC |
| 2026-09-22 | 22.0°C | 23:20 UTC | 15.0°C | 15:20 UTC |
Nearby stations
- El Monte ArptUS15.4 km
- Los Angeles DowntownUnited States24.5 km
- Burbank/Bob Hope ArptUnited States28.6 km
- La Verne/Brackett FldUS29.5 km
- Los Angeles/Whiteman ArptUS33.2 km
- Upland/Cable ArptUnited States36.6 km
Data sources for this page
| Figure | Source | Type |
|---|---|---|
| Right now, today so far | NOAA Aviation Weather Center (METAR) and NOAA NWS WMO bulletins (SYNOP) | Measured, station |
| All-time, monthly and on-this-day records | NOAA NCEI Global Historical Climatology Network daily (GHCN-Daily), 1948 to 2026 | Measured, station |
| Nearby stations and distances | Computed from station positions in our own database | Calculated |
