Precipitation in San Lucas trails that of 94% of U.S. towns: 14 inches a year
High summer brings afternoon highs near 88°. Its January nights stay gentler than in 85% of U.S. towns. The latest 30-year average runs 1.7° warmer than 1901–2000’s, with January up the most. Keep the boiler serviced for the months from December to January, which average under 50°.
A year in San Lucas at a glance
Each month’s typical high and low, and what it brings.
What stands out about San Lucas’ climate
Compared with towns across the U.S., with San Lucas’ place in California beside it.
What a year in San Lucas feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 271 frost-free days a year
In half of years the last 32° night comes by February 23 and the first by November 22. Frost and day counts come from NOAA’s station at King City, CA, 8 miles from the town’s center, at about the same height.
The 2023 USDA map puts San Lucas’ center in zone 9a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 25°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 14 inches of rain a year
January is the wettest month and July the driest. Rain falls on about 51 days a year. Snow is rare: about 0.0" in a normal year at King City, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in San Lucas
80% of the work is heating. Months averaging under 55° run from November through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at King City, CA.
Living with San Lucas’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
271 frost-free days in zone 9a. The last frost comes by Feb 23 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 22.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 2.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in San Lucas from natural hazards, drought is the largest share (67%); heat waves, cold waves, winter storms and ice storms together are 2%. Normals are averages; the hazards page covers the extremes.
Natural hazards →San Lucas and similar climates
TownRatings has no climate map of the towns around San Lucas yet.
Climates most like San Lucas’, 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 |
|---|---|---|---|---|
| San Lucas, CA | 38° | 88° | 14" | 0.0" |
| Sierra Vista Southeast, AZ | 32° | 91° | 15" | 0.7" |
| Alpine, TX | 30° | 90° | 15" | 2.2" |
| Ashland, OR | 31° | 91° | 19" | 0.5" |
| Finley, WA | 29° | 91° | 9" | 2.0" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in San Lucas averaged 1.7° warmer than the 1900s. The biggest change is in January (+2.5°).
A bigger shift than in 69% 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 San Lucas compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with San Lucas’ place among California’s.
San Lucas weather by month
Highs, lows and precipitation from NOAA’s grid at San Lucas’ center; snow, wet days and snow on the ground from King City, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 62° | 38° | 3.0" | 0.0" | 9 | 0 | 46° – 56° |
| February | 65° | 40° | 2.9" | 0.0" | 9 | 0 | 46° – 58° |
| March | 69° | 42° | 2.4" | 0.0" | 8 | 0 | 49° – 62° |
| April | 73° | 43° | 1.0" | 0.0" | 5 | 0 | 54° – 63° |
| May | 79° | 47° | 0.4" | 0.0" | 3 | 0 | 58° – 69° |
| June | 85° | 51° | 0.1" | 0.0" | 1 | 0 | 64° – 72° |
| July | 88° | 54° | 0.0" | 0.0" | 0 | 0 | 68° – 75° |
| August | 88° | 54° | 0.0" | 0.0" | 0 | 0 | 69° – 75° |
| September | 87° | 52° | 0.1" | 0.0" | 1 | 0 | 66° – 72° |
| October | 80° | 46° | 0.6" | 0.0" | 2 | 0 | 60° – 68° |
| November | 69° | 40° | 1.1" | 0.0" | 5 | 0 | 48° – 60° |
| December | 61° | 36° | 2.1" | 0.0" | 9 | 0 | 45° – 52° |
| Year | 75° | 45° | 13.6" | 0.0" | 51 | 0 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 49° to 62°. August is the most reliable, staying within 6°.
Where San Lucas’ 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 San Lucas’ center.
- Snow: King City, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: King City, CA, 8 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 San Lucas’ climate
What is the weather like in San Lucas?
A typical July afternoon reaches 88°, a January night drops to 38°, and snow is almost unheard of. Milder January nights than 85% of U.S. towns; hotter July afternoons than 69% of U.S. towns.
How cold does it get in San Lucas in winter?
December nights average 36°. About 27 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 45°.
How much snow does San Lucas get?
About 0.0 inches in a normal winter at King City, CA, so most winters see none.
How hot does it get in San Lucas?
July, with a typical high of 88° and a low of 54°. About 39 days a year reach 90° and 6 reach 100° (King City, CA).
When is the first and last frost in San Lucas?
In half of years the last spring frost (32°) comes by February 23 and the first fall frost by November 22, about 271 frost-free days, at King City, CA.
What growing zone is San Lucas in?
Zone 9a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 25°.
What is the best time of year to visit San Lucas?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is San Lucas getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in San Lucas.
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.