Rackerby, CA climate
Rackerby has mild winters and hot summers. A typical July afternoon reaches 94°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rackerby feels like
Winter
Spring
Summer
Fall
Rackerby 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 | 56° | 39° | 7.8" | 0 | 12 | 0 | 44° – 55° |
| February | 59° | 41° | 7.6" | 0 | 11 | 0 | 44° – 56° |
| March | 63° | 43° | 6.6" | 0 | 11 | 0 | 46° – 60° |
| April | 68° | 46° | 3.4" | 0 | 8 | 0 | 51° – 61° |
| May | 77° | 53° | 2.0" | 0 | 5 | 0 | 55° – 73° |
| June | 86° | 59° | 0.7" | 0 | 2 | 0 | 67° – 78° |
| July | 94° | 65° | 0.0" | 0 | 0 | 0 | 75° – 83° |
| August | 92° | 64° | 0.1" | 0 | 1 | 0 | 75° – 82° |
| September | 87° | 60° | 0.3" | 0 | 2 | 0 | 69° – 78° |
| October | 76° | 52° | 2.3" | 0 | 4 | 0 | 60° – 70° |
| November | 63° | 44° | 4.6" | 0 | 8 | 0 | 46° – 60° |
| December | 55° | 39° | 8.4" | 0 | 12 | 0 | 43° – 51° |
| Year | 73° | 50° | 43.7" | 0.0" | 75 | 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 Rackerby
Rackerby gets 44 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 75 days a year.
About 321 frost-free days a year
In half of years the last 32° night comes by January 30 and the first one by December 13. That leaves about 321 frost-free days for gardens, longer than 96% of U.S. towns.
Heating and cooling a home in Rackerby
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rackerby, 57% of that work is heating and 43% 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 Rackerby 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 Rackerby averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.3°). The shift is smaller than in 54% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rackerby’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. May swings the most: between 1991 and 2020 its average temperature ranged from 55° to 73°. August is the most reliable, staying within 7°.
Common questions about Rackerby’s climate
What is the coldest month in Rackerby?
December, with a typical high of 55° and a low of 39°.
What is the hottest month in Rackerby?
July, with a typical high of 94° and a low of 65°. About 97 days a year reach 90°.
How much snow does Rackerby get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Rackerby?
In half of years the first 32° night comes by December 13, and the last spring frost by January 30.
What is the rainiest month in Rackerby?
December, with 8.4 inches of rain and melted snow. The year totals 44 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rackerby itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Colgate Powerhouse, CA (11 mi, snow) and Oroville, CA (12 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.