Larkspur, CO climate
Larkspur has chilly, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 15°, and about 121 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Larkspur feels like
Winter
Spring
Summer
Fall
Larkspur 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 44° | 15° | 0.7" | 14.4" | 7 | 22° – 35° |
| February | 45° | 16° | 0.8" | 10.9" | 6 | 24° – 37° |
| March | 52° | 23° | 1.5" | 24.2" | 9 | 33° – 43° |
| April | 58° | 29° | 2.5" | 23.7" | 9 | 38° – 49° |
| May | 66° | 38° | 2.3" | 3.3" | 9 | 46° – 56° |
| June | 78° | 47° | 1.9" | 0 | 11 | 59° – 68° |
| July | 84° | 53° | 2.7" | 0 | 12 | 65° – 72° |
| August | 81° | 52° | 2.4" | 0 | 14 | 62° – 70° |
| September | 74° | 43° | 1.5" | 1.7" | 7 | 53° – 63° |
| October | 63° | 32° | 1.1" | 11.1" | 5 | 40° – 52° |
| November | 51° | 23° | 0.8" | 18.4" | 8 | 29° – 44° |
| December | 44° | 15° | 0.8" | 13.4" | 7 | 22° – 34° |
| Year | 62° | 32° | 18.9" | 121.1" | 106 |
“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 Larkspur
Larkspur gets 19 inches of rain and melted snow a year. July is the wettest month and January the driest. Rain or snow falls on about 106 days a year.
About 138 frost-free days a year
In half of years the last 32° night comes by May 14 and the first one by October 1. That leaves about 138 frost-free days for gardens, shorter than 90% of U.S. towns.
Heating and cooling a home in Larkspur
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Larkspur, 97% of that work is heating and 3% is cooling, so the furnace matters far more than the air conditioner.
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 Larkspur 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 Larkspur averaged 1.0° warmer than the 1900s. The biggest change is in March (+2.8°). The shift is smaller than in 72% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Larkspur’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 29° to 44°. July is the most reliable, staying within 7°.
Common questions about Larkspur’s climate
What is the coldest month in Larkspur?
December, with a typical high of 44° and a low of 15°.
What is the hottest month in Larkspur?
July, with a typical high of 84° and a low of 53°. About 7 days a year reach 90°.
How much snow does Larkspur get?
About 121 inches in a normal winter, most of it in March.
When is the first frost in Larkspur?
In half of years the first 32° night comes by October 1, and the last spring frost by May 14.
What is the rainiest month in Larkspur?
July, with 2.7 inches of rain and melted snow. The year totals 19 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Larkspur itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Monument, CO (9 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.