Oakland, California climate: Normal weather by month, frost dates and records

What is the weather like in Oakland each month?

September is the warmest month, with normal highs of 74°F; January the coldest, with normal lows of 42°F. The most precipitation falls in December (3.84 in), the least in July (0.00 in).

Each month has its own page with the day-by-day normals, the month's records and its recent years:

• Jan
• Feb
• Mar
• Apr
• May
• Jun
• Jul
• Aug
• Sep
• Oct
• Nov
• Dec

When is the best weather to visit Oakland?

Normal highs sit between 65°F and 85°F in April, May, June, July, August, September and October. Of those, July has the fewest days with rain (0).

That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.

When is the last frost in Oakland?

In Oakland, the last spring frost (32°F) comes after January 7 in half of years and after February 8 in one year in ten; the first autumn frost comes before December 23 in half of years and before November 30 in one year in ten. A night at 32°F or colder comes at all in 63% of years here (NOAA).

Last spring frost, half of years after

January 71 year in 10 after February 8; 9 in 10 after December 13

First autumn frost, half of years before

December 231 year in 10 before November 30; 9 in 10 before January 24

NOAA puts the median frost-free season at 356 days, and the season without a hard freeze (28°F) at 365 days.

A hard freeze (28°F) comes after December 30 in half of springs and before December 28 in half of autumns.

The USDA's 2023 Plant Hardiness Zone Map puts Oakland in zones 9b to 10b across its 16 ZIP code areas (9b in 94605, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Oakland's NOAA station is in zone 10a: the coldest night of a typical year reaches 31°F (20 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.

Frost dates for every NOAA station in California · Frost dates by ZIP code

What hardiness zone is each Oakland ZIP code in?

The USDA's 2023 map gives each ZIP code area one zone. Oakland's 16 ZIP code areas run from zone 9b to 10b: 14 in 10a, 1 in 10b and 1 in 9b. Each ZIP's frost dates are in the frost tool.

How hot and how cold does it get in Oakland?

In a normal year in Oakland, 6 days a year reach 90°F, 3 nights fall to 32°F or colder and 68 days bring measurable precipitation.

Days at 90°F or more

6a normal year

Days at 100°F or more

fewer than 1a normal year

Nights at 32°F or colder

3a normal year

Days that stay below freezing

fewer than 1high of 32°F or less

Days with 0.01 inch of precipitation

68a normal year

The highest temperature in this station's record (since 1948) is 104°F, on September 6, 2020; the lowest is 25°F, on January 5, 1949.

The wettest calendar year on that record is 1973, with 29.37 in; the snowiest season is 1975–76, with 1.0 inches.

How humid and windy is Oakland, and how clear are its skies?

The summer (June-August) dew point averages 55°F. The muggiest month is August, with an average dew point of 55°F; the driest air comes in December (42°F). May is the windiest month (10.6 mph on average), and August has the most clear or nearly clear hours (75%).

How sunny is Oakland?

Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Oakland, 4.7 kWh per square metre a day. June is the sunniest month (84%) and December the cloudiest (74%). Among the 459 U.S. places of 50,000 or more, that ranks tied 125th (with 50 others) in sunshine.

How much heating and cooling does Oakland need?

A normal year in Oakland brings 2,690 heating degree days, 50% fewer than the median U.S. place (5,373), and 175 cooling degree days, 81% fewer than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,106 growing degree days a year above 50°F.

Has Oakland been warmer than normal lately?

2025 averaged 58.4°F, 0.3°F above the 1991-2020 normal of 58.1°F. 3 of the 4 complete years since 2021 ran warmer than the normal.

Over 52 complete years from 1950 to 2025, the station's annual mean temperature rose at a fitted 3.4°F per century (+0.19°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.

Which places near Oakland share this climate record?

2 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.

• San Leandro, CAalso near: Hayward (4 mi, 59.6°F a year); Oakland Museum (9 mi, 59.6°F a year)86,571 people · 3 mi E
• Alameda, CAalso near: Oakland Museum (4 mi, 59.6°F a year); Berkeley (9 mi, 58.5°F a year)78,795 people · 3 mi NW

What do Oakland's other NOAA stations record?

One more NOAA station keeps 1991-2020 normals in or near Oakland. This page uses Oakland Metro International Airport; the other differs by site and elevation, and the linked ones have pages of their own:

Nearby and next

• Oakland in OctoberThis month day by day, its records and recent years
• California climateThe statewide normals and every place in the state
• Oakland Museum, CA6 miles from this station, 59.6°F a year
• Hayward, CA7 miles from this station, 59.6°F a year
• Berkeley, CA11 miles from this station, 58.5°F a year
• San Francisco, CA12 miles from this station, 57.7°F a year
• Compare two placesMonth by month, side by side

Download these normals (CSV) · JSON · How these figures are made