San Lucas, CA climate
San Lucas has mild winters and warm summers, with very little rain. A typical July afternoon reaches 88°, a January night drops to 38°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in San Lucas feels like
Winter
Spring
Summer
Fall
San Lucas weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 62° | 38° | 3.0" | 0 | 9 | 0 | 46° – 56° |
| February | 65° | 40° | 2.9" | 0 | 9 | 0 | 46° – 58° |
| March | 69° | 42° | 2.4" | 0 | 8 | 0 | 49° – 62° |
| April | 73° | 43° | 1.0" | 0 | 5 | 0 | 54° – 63° |
| May | 79° | 47° | 0.4" | 0 | 3 | 0 | 58° – 69° |
| June | 85° | 51° | 0.1" | 0 | 1 | 0 | 64° – 72° |
| July | 88° | 54° | 0.0" | 0 | 0 | 0 | 68° – 75° |
| August | 88° | 54° | 0.0" | 0 | 0 | 0 | 69° – 75° |
| September | 87° | 52° | 0.1" | 0 | 1 | 0 | 66° – 72° |
| October | 80° | 46° | 0.6" | 0 | 2 | 0 | 60° – 68° |
| November | 69° | 40° | 1.1" | 0 | 5 | 0 | 48° – 60° |
| December | 61° | 36° | 2.1" | 0 | 9 | 0 | 45° – 52° |
| Year | 75° | 45° | 13.6" | 0.0" | 51 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in San Lucas
San Lucas gets 14 inches of rain and melted snow a year. January is the wettest month and July the driest. Rain or snow falls on about 51 days a year.
About 271 frost-free days a year
In half of years the last 32° night comes by February 23 and the first one by November 22. That leaves about 271 frost-free days for gardens, longer than 93% of U.S. towns.
Heating and cooling a home in San Lucas
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In San Lucas, 80% of that work is heating and 20% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How San Lucas compares
Compared with every U.S. town and city on TownTapestry, each counted once.
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°). The shift is larger than in 79% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at San Lucas’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 49° to 62°. August is the most reliable, staying within 6°.
Common questions about San Lucas’s climate
What is the coldest month in San Lucas?
December, with a typical high of 61° and a low of 36°.
What is the hottest month in San Lucas?
July, with a typical high of 88° and a low of 54°. About 39 days a year reach 90°.
How much snow does San Lucas get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in San Lucas?
In half of years the first 32° night comes by November 22, and the last spring frost by February 23.
What is the rainiest month in San Lucas?
January, with 3.0 inches of rain and melted snow. The year totals 14 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for San Lucas itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at King City, CA (8 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.