San Leandro, California climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put San Leandro's center at January lows of 44°F and July highs of 75°F, a yearly mean of 59.3°F and 18.2 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Oakland (3 miles W, 6 ft), has January lows of 42°F and July highs of 72°F.
86,571 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 59° 44°
- Feb 61° 46°
- Mar 64° 48°
- Apr 67° 49°
- May 70° 52°
- Jun 74° 55°
- Jul 75° 57°
- Aug 75° 57°
- Sep 76° 56°
- Oct 72° 53°
- Nov 64° 48°
- Dec 58° 43°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at San Leandro's center.
What is each month like in San Leandro?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Oakland high | Oakland low |
|---|---|---|---|---|---|---|
| January | 59°F | 44°F | 51.0°F | 3.48 | 58°F | 42°F |
| February | 61°F | 46°F | 53.5°F | 3.48 | 60°F | 45°F |
| March | 64°F | 48°F | 55.9°F | 2.70 | 63°F | 47°F |
| April | 67°F | 49°F | 57.9°F | 1.37 | 66°F | 49°F |
| May | 70°F | 52°F | 60.9°F | 0.64 | 68°F | 52°F |
| June | 74°F | 55°F | 64.5°F | 0.14 | 71°F | 54°F |
| July | 75°F | 57°F | 65.7°F | 0.00 | 72°F | 56°F |
| August | 75°F | 57°F | 66.2°F | 0.03 | 72°F | 57°F |
| September | 76°F | 56°F | 65.9°F | 0.11 | 74°F | 56°F |
| October | 72°F | 53°F | 62.7°F | 0.85 | 72°F | 51°F |
| November | 64°F | 48°F | 56.2°F | 1.86 | 64°F | 46°F |
| December | 58°F | 43°F | 50.9°F | 3.55 | 58°F | 42°F |
In metric: a yearly mean of 15.2°C, January lows of 6°C, July highs of 24°C and 463 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around San Leandro say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| OaklandOakland Metro International Airport | 3 mi W | 6 ft | 58.1°F | 42°F | 72°F | 18.7 | – | January 7 |
| HaywardHayward Air Terminal | 4 mi SE | 43 ft | 59.6°F | 43°F | 75°F | 16.0 | – | January 2 |
| Oakland Museum | 9 mi NW | 30 ft | 59.6°F | 45°F | 72°F | 22.6 | 0 | – |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in San Leandro?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Oakland (3 miles W, 6 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, Oakland Museum (9 miles NW), gets 0 inches a year. The last spring frost (32°F) comes after January 7 in half of years and the first autumn frost before December 23. Its record high is 104°F (2020) and its record low 25°F (1949) (kept since 1948).
The USDA's 2023 Plant Hardiness Zone Map puts San Leandro in zone 10a across its 3 ZIP code areas.
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (4.7 kWh per square metre a day, NASA POWER 2001-2020); June is the sunniest month (84%) and December the cloudiest (74%).
Oakland's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for San Leandro; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USW00023230; records: ACIS; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across San Leandro, ZIP code by ZIP code?
3 ZIP code areas lie wholly or partly in San Leandro. On NOAA's grid 94578 is the warmest (59.3°F a year) and 94577 the coolest (59.2°F), so the city is nearly uniform. Each row also names the nearest station record and its frost dates.
| ZIP code | Zone | Year | Jan low | Jul high | Precip. | Nearest record | Last frost | First frost |
|---|---|---|---|---|---|---|---|---|
| 94577 | 10a | 59.2°F | 44°F | 74°F | 19.3 | Oakland (3 mi) | January 7 | December 23 |
| 94578 | 10a | 59.3°F | 44°F | 75°F | 18.2 | Hayward (4 mi) | January 2 | December 25 |
| 94579 | 10a | 59.3°F | 44°F | 75°F | 18.2 | Hayward (3 mi) | January 2 | December 25 |
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.