San Gabriel Fire Dept
frost dates.
A source-backed view of historical freeze risk at this weather station. Use it to understand the season, not as a promise about your garden or this year’s weather.
Infrequent freezing; conditional datesOne date never tells
the whole season.
1991–2020 station normals
32°F minimum-temperature threshold
Last spring freeze
Among cold seasons with a freeze: probability of the last occurrence on this date or later.
The 10% date is later in spring than the median: a more cautious historical reference, still not a guarantee.
First fall freeze
Among cold seasons with a freeze: probability of the first occurrence on this date or earlier.
The 10% date is earlier in fall than the median: a more cautious harvest-planning reference.
These percentages are conditional on a cold season containing a 32°F freeze; they are not probabilities across all years. They describe historical climate, not this season’s forecast. The spring and fall probability directions are intentionally different. A garden can be warmer or colder than the reference station.
The reference
behind the numbers.
- Official station name
- SAN GABRIEL FIRE DEPT, CA US
- NOAA station ID
- USC00047785
- Coordinates
- 34.0842, -118.1003
- Station elevation
- 110.6 m / 363 ft
- Normal period
- 1991–2020
- Source retrieved
- 2026-10-02
- Source modified
- Tue, 27 Jun 2023 15:16:19 GMT
A baseline.
Not a forecast.
Weather stations measure a particular location. Differences in elevation, exposure, nearby water, terrain and urban heat can change conditions in an individual garden.
- 32°F is the station air-temperature threshold; visible frost on leaves can differ.
- Median dates still leave substantial historical freeze risk.
- Historical normals summarize 1991–2020, not current weather.
- Crop suitability requires regional horticultural guidance, soil warmth, cultivar and day length.
How strong is this reference?
| Source variable | Historical date | Years | NOAA completeness |
|---|---|---|---|
| Last spring freeze · 10% | Jan 28 | 18 | R · Representative |
| Last spring freeze · 30% | Jan 13 | 18 | R · Representative |
| Last spring freeze · 50% | Jan 4 | 18 | R · Representative |
| First fall freeze · 10% | Dec 18 | 18 | R · Representative |
| First fall freeze · 30% | Dec 28 | 18 | R · Representative |
| First fall freeze · 50% | Jan 2 (next year) | 18 | R · Representative |
Our ordinary calendar model requires supported dates and standard/representative source quality with at least 10 years. This does not erase local uncertainty.
Places using this nearby reference
Connections are based on Census internal points and straight-line distance.
San Gabriel, CA
1.2 km to this station
See the matchRosemead, CA
2.4 km to this station
See the matchAlhambra, CA
3.3 km to this station
See the matchEast San Gabriel, CA
4.0 km to this station
See the matchSouth San Gabriel, CA
4.1 km to this station
See the matchTemple City, CA
4.4 km to this station
See the matchMonterey Park, CA
5.0 km to this station
See the matchSouth El Monte, CA
6.1 km to this station
See the match