Crystal Lake Park, MO climate
Crystal Lake Park has chilly winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 23°, and about 10 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Crystal Lake Park feels like
Winter
Spring
Summer
Fall
Crystal Lake Park 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 | 40° | 23° | 2.6" | 4.1" | 7 | 5 | 26° – 42° |
| February | 45° | 27° | 2.2" | 2.8" | 7 | 2 | 27° – 46° |
| March | 56° | 35° | 3.5" | 1.0" | 9 | 1 | 38° – 59° |
| April | 68° | 45° | 4.7" | 0.1" | 10 | 0 | 49° – 62° |
| May | 76° | 56° | 5.0" | 0 | 11 | 0 | 61° – 74° |
| June | 85° | 65° | 4.5" | 0 | 8 | 0 | 70° – 79° |
| July | 88° | 69° | 3.8" | 0 | 8 | 0 | 74° – 85° |
| August | 87° | 67° | 3.5" | 0 | 7 | 0 | 71° – 83° |
| September | 80° | 59° | 3.4" | 0 | 7 | 0 | 65° – 76° |
| October | 69° | 47° | 3.1" | 0 | 7 | 0 | 52° – 64° |
| November | 55° | 36° | 3.4" | 0.5" | 8 | 0 | 38° – 53° |
| December | 44° | 28° | 2.7" | 1.7" | 9 | 3 | 22° – 44° |
| Year | 66° | 46° | 42.5" | 10.2" | 97 | 11 |
“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 Crystal Lake Park
Crystal Lake Park gets 43 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 97 days a year. Snow covers the ground about 11 days of the year.
About 206 frost-free days a year
In half of years the last 32° night comes by April 4 and the first one by October 29. That leaves about 206 frost-free days for gardens, longer than 76% of U.S. towns.
Heating and cooling a home in Crystal Lake Park
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Crystal Lake Park, 75% of that work is heating and 25% 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.
Crystal Lake Park and its neighbors
Crystal Lake Park borders 2 towns with climate data. January nights across them vary by 0.1°. Town and Country has the coldest January nights (23°) and Frontenac the hottest July afternoons (88°). Crystal Lake Park’s January low is 23° and its July high 88°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Crystal Lake Park 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 Crystal Lake Park averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.1°). The shift is smaller than in 73% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Crystal Lake Park’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 22° to 44°. June is the most reliable, staying within 9°.
Common questions about Crystal Lake Park’s climate
What is the coldest month in Crystal Lake Park?
January, with a typical high of 40° and a low of 23°.
What is the hottest month in Crystal Lake Park?
July, with a typical high of 88° and a low of 69°. About 41 days a year reach 90°.
How much snow does Crystal Lake Park get?
About 10 inches in a normal winter, most of it in January.
When is the first frost in Crystal Lake Park?
In half of years the first 32° night comes by October 29, and the last spring frost by April 4.
What is the rainiest month in Crystal Lake Park?
May, with 5.0 inches of rain and melted snow. The year totals 43 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Crystal Lake Park itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Valley Park, MO (5 mi, snow) and St Charles 7 Ssw, MO (7 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.