Updated October 2026
San Gregorio State Beach: Weather by Month and When to Go
San Gregorio State Beach is part of the California state park system. Average highs range from 59°F in December to 72°F in September.
Average highs sit between 60°F and 80°F in January through November. They stay below 60°F in December. The figures are NOAA climate normals for 1991–2020, measured at a weather station 1.8 miles from the park.
Warmest average high
72°F
September
Coldest average low
40°F
December and January
Most precipitation
6.2 in
February
Longest days
14.6 h
June
San Gregorio State Beach weather by month
| Month | Average high | Average low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 60°F | 40°F | 5.8 in | 9.7 h |
| February | 60°F | 41°F | 6.2 in | 10.6 h |
| March | 61°F | 42°F | 4.3 in | 11.7 h |
| April | 62°F | 43°F | 2.3 in | 13.0 h |
| May | 64°F | 46°F | 0.9 in | 14.0 h |
| June | 67°F | 48°F | 0.4 in | 14.6 h |
| July | 69°F | 52°F | 0.1 in | 14.3 h |
| August | 71°F | 52°F | 0.2 in | 13.4 h |
| September | 72°F | 49°F | 0.2 in | 12.2 h |
| October | 69°F | 45°F | 1.3 in | 11.0 h |
| November | 63°F | 41°F | 2.6 in | 9.9 h |
| December | 59°F | 40°F | 6.1 in | 9.4 h |
Temperature and precipitation figures are NOAA climate normals for 1991–2020 from station USC00047807, the nearest station with a complete set of temperature normals, 1.8 miles from the park. Conditions in the park can differ from the station's, most of all where the two sit at different elevations. Daylight is calculated for the park's latitude at the middle of each month.
What the averages show
- Temperature. September is the warmest month, with an average high of 72°F and an average low of 49°F. December and January are the coldest months, each with an average low of 40°F.
- Precipitation. February is the wettest month, averaging 6.2 inches of precipitation, and July is the driest, at 0.1 inches. An average year brings about 30.4 inches in total.
- Snowfall. The station's snowfall normal is 0.0 inches in every month.
- Daylight. Days run from about 9.4 hours of daylight in December to 14.6 hours in June.
Camping, trails, maps and fees
Whether San Gregorio State Beach has camping or cabins, where its trails run, when it opens and what it charges are all published by the agency that runs the park. Its official page is the place to check before a trip.
Official San Gregorio State Beach page
For the forecast rather than the averages, the National Weather Service issues a point forecast for the park's location.
National Weather Service forecast for San Gregorio State Beach
Where to stay near San Gregorio State Beach
Hotels, cabins and vacation rentals near San Gregorio State Beach, with live availability and prices.
Top-rated places to stay near San Gregorio State Beach
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Frequently Asked Questions
September is the warmest month, with an average high of 72°F and an average low of 49°F. December and January are the coldest months, each with an average low of 40°F. These are NOAA 1991–2020 climate normals from a weather station 1.8 miles from the park.
Average highs sit between 60°F and 80°F in January through November. They stay below 60°F in December.
February is the wettest month, averaging 6.2 inches of precipitation, and July is the driest, at 0.1 inches. An average year brings about 30.4 inches in total. The station's snowfall normal is 0.0 inches in every month.
Days run from about 9.4 hours of daylight in December to 14.6 hours in June. The hours are calculated for the park's latitude.
Nearest National Park Service sites
- San Francisco Maritime National Historical Park34 miles away
- Fort Point National Historic Site34 miles away
- Golden Gate National Recreation Area39 miles away
Nearby state parks
- Half Moon Bay State Beach11 miles away
- Portola Redwoods State Park11 miles away
- Big Basin Redwoods State Park13 miles away
- Montara State Beach18 miles away
Distances are measured in a straight line from the park, so the drive is longer.
Sources: NOAA NCEI U.S. Climate Normals 1991–2020; USGS Protected Areas Database for location; the official California state park listing for the park's name.