Hillsborough, California Climate
United States
Pop. 11,451 Elev. 93 m / 305 ft
TZ: America/Los_Angeles (UTC-7) ·
Hillsborough has a mild, temperate climate year-round, with temperatures ranging from 48°F (9°C) in January to 67°F (19°C) in September. Rain falls on about 26 days per year (17.3 in / 439 mm total). Overcast skies are common, with only 104 sunny days per year. Ocean water temperatures reach 62°F (17°C) in summer.
| Temperature | 67°F (19°C) high | 48°F (9°C) low |
| Feels like | 47°F (8°C) low | |
| Rain | 26 days | 17.3 in (439 mm) /yr |
| Sky | 104 sunny | 15 stormy |
| Wind | 5.1 mph (2.3 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jul, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
40
Jan 65
Feb 60
Mar 60
Apr 43
May 52
Jun 73
Jul 51
Aug 60
Sep 42
Oct 65
Nov 59
Dec Humidity (%)
75
Jan 83
Feb 80
Mar 83
Apr 82
May 84
Jun 87
Jul 85
Aug 86
Sep 83
Oct 87
Nov 86
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 3 mi San Francisco International Airport (SFO)
Ski resort 139 mi Leland Snowplay
National park 7 mi Sky Ridge
Mountain peak
(4,977 ft) 99 mi South Ventana Cone
Hospital 1 mi Mills-Peninsula Medical Center
Hiking trail 5 mi Sweeney Ridge Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 57°F 14°C | 48°F 9°C | 0.5 in 12 mm | — | 16 |
| February | 57°F 14°C | 50°F 10°C | 4.5 in 116 mm | — | 6 |
| March | 57°F 14°C | 50°F 10°C | 3.2 in 82 mm | — | 7 |
| April | 57°F 14°C | 51°F 10°C | 0.7 in 17 mm | — | 6 |
| May | 59°F 15°C | 52°F 11°C | 0.2 in 4 mm | — | 13 |
| June | 60°F 15°C | 53°F 12°C | 0.1 in 3 mm | — | 10 |
| July | 60°F 16°C | 54°F 12°C | 0.2 in 6 mm | — | 2 |
| August | 65°F 18°C | 57°F 14°C | 0.3 in 7 mm | — | 11 |
| September | 67°F 19°C | 60°F 16°C | 0.2 in 6 mm | — | 6 |
| October | 65°F 18°C | 57°F 14°C | 1.3 in 32 mm | — | 15 |
| November | 61°F 16°C | 54°F 12°C | 3.1 in 80 mm | — | 3 |
| December | 57°F 14°C | 51°F 10°C | 3.0 in 76 mm | — | 9 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 16 | 0 |
| February | 6 | 4 |
| March | 7 | 3 |
| April | 6 | 1 |
| May | 13 | 0 |
| June | 10 | 0 |
| July | 2 | 0 |
| August | 11 | 0 |
| September | 6 | 0 |
| October | 15 | 1 |
| November | 3 | 2 |
| December | 9 | 4 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 53°F 12°C | 52°F 11°C |
| February | 54°F 12°C | 52°F 11°C |
| March | 55°F 13°C | 53°F 12°C |
| April | 56°F 13°C | 55°F 13°C |
| May | 55°F 13°C | 57°F 14°C |
| June | 57°F 14°C | 58°F 15°C |
| July | 60°F 16°C | 59°F 15°C |
| August | 61°F 16°C | 62°F 17°C |
| September | 62°F 17°C | 64°F 18°C |
| October | 62°F 17°C | 62°F 17°C |
| November | 58°F 14°C | 59°F 15°C |
| December | 56°F 14°C | 55°F 13°C |