Twin Lakes, IA climate
Twin Lakes has cold, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 9°, and about 32 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Twin Lakes feels like
Winter
Spring
Summer
Fall
Twin Lakes 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 | 27° | 9° | 0.8" | 7.4" | 5 | 23 | 7° – 32° |
| February | 32° | 14° | 1.0" | 7.6" | 5 | 20 | 12° – 34° |
| March | 45° | 26° | 1.9" | 4.9" | 7 | 10 | 28° – 51° |
| April | 60° | 36° | 3.6" | 1.9" | 9 | 1 | 38° – 55° |
| May | 71° | 48° | 4.6" | 0 | 12 | 0 | 53° – 66° |
| June | 81° | 59° | 5.1" | 0 | 11 | 0 | 66° – 74° |
| July | 83° | 62° | 3.9" | 0 | 9 | 0 | 67° – 78° |
| August | 81° | 60° | 4.2" | 0 | 9 | 0 | 65° – 75° |
| September | 75° | 51° | 3.0" | 0 | 8 | 0 | 57° – 68° |
| October | 62° | 39° | 2.4" | 0.6" | 8 | 0 | 44° – 55° |
| November | 46° | 26° | 1.5" | 2.4" | 5 | 4 | 25° – 48° |
| December | 32° | 15° | 1.2" | 7.3" | 5 | 15 | 8° – 31° |
| Year | 58° | 37° | 33.2" | 32.1" | 94 | 74 |
“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 Twin Lakes
Twin Lakes gets 33 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 94 days a year. Snow covers the ground about 74 days of the year.
About 167 frost-free days a year
In half of years the last 32° night comes by April 26 and the first one by October 10. That leaves about 167 frost-free days for gardens, shorter than 64% of U.S. towns.
Heating and cooling a home in Twin Lakes
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Twin Lakes, 91% of that work is heating and 9% 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 Twin Lakes 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 Twin Lakes averaged 0.7° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 92% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Twin Lakes’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 7° to 32°. June is the most reliable, staying within 7°.
Common questions about Twin Lakes’s climate
What is the coldest month in Twin Lakes?
January, with a typical high of 27° and a low of 9°.
What is the hottest month in Twin Lakes?
July, with a typical high of 83° and a low of 62°. About 13 days a year reach 90°.
How much snow does Twin Lakes get?
About 32 inches in a normal winter, most of it in February.
When is the first frost in Twin Lakes?
In half of years the first 32° night comes by October 10, and the last spring frost by April 26.
What is the rainiest month in Twin Lakes?
June, with 5.1 inches of rain and melted snow. The year totals 33 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Twin Lakes itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Rockwell City, IA (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.