Lake Riverside, CA climate
Lake Riverside has mild winters and warm summers, with very little rain. A typical July afternoon reaches 92°, a January night drops to 37°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Lake Riverside feels like
Winter
Spring
Summer
Fall
Lake Riverside 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 | 60° | 37° | 4.0" | 0 | 4 | 0 | 44° – 55° |
| February | 60° | 37° | 4.8" | 0 | 6 | 0 | 41° – 57° |
| March | 64° | 39° | 3.1" | 0 | 4 | 0 | 43° – 59° |
| April | 69° | 41° | 1.3" | 0 | 3 | 0 | 49° – 59° |
| May | 76° | 46° | 0.7" | 0 | 2 | 0 | 54° – 68° |
| June | 85° | 52° | 0.1" | 0 | 0 | 0 | 62° – 74° |
| July | 92° | 59° | 0.2" | 0 | 1 | 0 | 70° – 80° |
| August | 93° | 60° | 0.2" | 0 | 1 | 0 | 73° – 79° |
| September | 87° | 56° | 0.4" | 0 | 1 | 0 | 68° – 76° |
| October | 77° | 49° | 0.8" | 0 | 2 | 0 | 59° – 69° |
| November | 67° | 41° | 1.5" | 0 | 3 | 0 | 45° – 60° |
| December | 59° | 36° | 3.4" | 0 | 4 | 0 | 43° – 55° |
| Year | 74° | 46° | 20.4" | 0.0" | 32 | 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 Lake Riverside
Lake Riverside gets 20 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 32 days a year.
About 201 frost-free days a year
In half of years the last 32° night comes by April 29 and the first one by November 18. That leaves about 201 frost-free days for gardens, longer than 73% of U.S. towns.
Heating and cooling a home in Lake Riverside
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Lake Riverside, 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 Lake Riverside 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 Lake Riverside averaged 2.0° warmer than the 1900s. The biggest change is in January (+3.0°). The shift is larger than in 95% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Lake Riverside’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 41° to 57°. August is the most reliable, staying within 6°.
Common questions about Lake Riverside’s climate
What is the coldest month in Lake Riverside?
December, with a typical high of 59° and a low of 36°.
What is the hottest month in Lake Riverside?
August, with a typical high of 93° and a low of 60°. About 10 days a year reach 90°.
How much snow does Lake Riverside get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Lake Riverside?
In half of years the first 32° night comes by November 18, and the last spring frost by April 29.
What is the rainiest month in Lake Riverside?
February, with 4.8 inches of rain and melted snow. The year totals 20 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Lake Riverside itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Anza, CA (8 mi, snow) and Palomar Mtn Obsy, CA (10 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.