Photo: Dicklyon · CC BY-SA 4.0Pacifica’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 68°, a January night drops to 45°, and snow is almost unheard of.
A year in Pacifica at a glance
Each month’s typical high and low, and what it brings.
What stands out about Pacifica’s climate
Compared with towns across the U.S., with Pacifica’s place in California beside it.
What a year in Pacifica feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at Pacifica 4 Sse, CA, 1.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Pacifica’s center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 34°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 27 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 69 days a year. Snow is rare: about 0.0" in a normal year at Pacifica 4 Sse, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Pacifica
96% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from December through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Pacifica 4 Sse, CA.
Living with Pacifica’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 1 winter in 5, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 42 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Pacifica from natural hazards, earthquakes are the largest share (70%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Pacifica and its neighbors
San Bruno has the coldest January nights next door (44°, 1° colder) and San Bruno the hottest July afternoons (70°, 2° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Pacifica’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Pacifica, CA | 45° | 68° | 27" | 0.0" |
| Port Angeles, WA | 37° | 69° | 28" | 0.4" |
| Makawao, HI | 53° | 75° | 23" | 0.0" |
| Coos Bay, OR | 40° | 66° | 61" | 0.2" |
| Nantucket, MA | 26° | 76° | 44" | 25" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Pacifica averaged 1.6° warmer than the 1900s. The biggest change is in January (+2.3°).
A bigger shift than in 68% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Pacifica compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Pacifica’s place among California’s.
Pacifica weather by month
Highs, lows and precipitation from NOAA’s grid at Pacifica’s center; snow, wet days and snow on the ground from Pacifica 4 Sse, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 57° | 45° | 5.3" | 0.0" | 11 | 0 | 48° – 54° |
| February | 58° | 46° | 5.3" | 0.0" | 12 | 0 | 49° – 57° |
| March | 60° | 47° | 3.9" | 0.0" | 10 | 0 | 49° – 58° |
| April | 62° | 48° | 1.9" | 0.0" | 6 | 0 | 51° – 58° |
| May | 64° | 50° | 0.8" | 0.0" | 4 | 0 | 53° – 61° |
| June | 66° | 52° | 0.2" | 0.0" | 2 | 0 | 56° – 61° |
| July | 68° | 54° | 0.0" | 0.0" | 0 | 0 | 58° – 64° |
| August | 69° | 55° | 0.1" | 0.0" | 1 | 0 | 59° – 66° |
| September | 70° | 55° | 0.1" | 0.0" | 2 | 0 | 59° – 67° |
| October | 68° | 52° | 1.2" | 0.0" | 4 | 0 | 58° – 64° |
| November | 62° | 49° | 2.7" | 0.0" | 7 | 0 | 49° – 58° |
| December | 57° | 45° | 5.6" | 0.0" | 11 | 0 | 47° – 56° |
| Year | 63° | 50° | 27.1" | 0.0" | 69 | 0 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 49° to 58°. July is the most reliable, staying within 5°.
Where Pacifica’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Pacifica’s center.
- Snow: Pacifica 4 Sse, CA (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pacifica 4 Sse, CA, 1.2 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Pacifica’s climate
What is the weather like in Pacifica?
A typical July afternoon reaches 68°, a January night drops to 45°, and snow is almost unheard of. Milder January nights than 94% of U.S. towns; cooler July afternoons than all but 53 U.S. towns.
How cold does it get in Pacifica in winter?
January nights average 45°. A night at 32° or below comes in only some winters (0.6 a year on average). In the coldest January of the last 30 years the month averaged 48°.
How much snow does Pacifica get?
About 0.0 inches in a normal winter at Pacifica 4 Sse, CA, so most winters see none.
How hot does it get in Pacifica?
July, with a typical high of 68° and a low of 54°. About 2 days a year reach 90° (Pacifica 4 Sse, CA).
When is the first and last frost in Pacifica?
Most years have no frost at all: a 32° night comes in about 20% of winters at Pacifica 4 Sse, CA, usually in December or January.
What growing zone is Pacifica in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 34°.
What is the best time of year to visit Pacifica?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Pacifica getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 68% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Pacifica.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.