Diamondhead Lake, IA climate
Diamondhead Lake has cold winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 12°, and about 26 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Diamondhead Lake feels like
Winter
Spring
Summer
Fall
Diamondhead Lake 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 | 30° | 12° | 0.8" | 6.8" | 6 | 17 | 13° – 34° |
| February | 35° | 16° | 1.1" | 7.3" | 7 | 16 | 16° – 36° |
| March | 49° | 27° | 1.9" | 3.0" | 8 | 6 | 31° – 53° |
| April | 62° | 38° | 3.7" | 0.8" | 11 | 1 | 41° – 56° |
| May | 72° | 49° | 5.1" | 0.1" | 13 | 0 | 55° – 68° |
| June | 82° | 60° | 5.0" | 0 | 11 | 0 | 68° – 75° |
| July | 85° | 64° | 4.2" | 0 | 9 | 0 | 69° – 81° |
| August | 83° | 61° | 4.1" | 0 | 9 | 0 | 66° – 77° |
| September | 77° | 52° | 3.5" | 0 | 8 | 0 | 58° – 69° |
| October | 64° | 40° | 2.7" | 0.4" | 9 | 0 | 45° – 57° |
| November | 48° | 28° | 1.7" | 1.7" | 6 | 2 | 29° – 49° |
| December | 35° | 17° | 1.3" | 5.4" | 7 | 11 | 11° – 34° |
| Year | 60° | 39° | 35.0" | 25.5" | 103 | 52 |
“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 Diamondhead Lake
Diamondhead Lake gets 35 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 103 days a year. Snow covers the ground about 52 days of the year.
About 153 frost-free days a year
In half of years the last 32° night comes by May 2 and the first one by October 3. That leaves about 153 frost-free days for gardens, shorter than 78% of U.S. towns.
Heating and cooling a home in Diamondhead Lake
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Diamondhead Lake, 89% of that work is heating and 11% 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 Diamondhead Lake 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 Diamondhead Lake averaged 0.5° warmer than the 1900s. The biggest change is in December (+2.2°). The shift is smaller than in 96% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Diamondhead Lake’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 11° to 34°. June is the most reliable, staying within 8°.
Common questions about Diamondhead Lake’s climate
What is the coldest month in Diamondhead Lake?
January, with a typical high of 30° and a low of 12°.
What is the hottest month in Diamondhead Lake?
July, with a typical high of 85° and a low of 64°. About 21 days a year reach 90°.
How much snow does Diamondhead Lake get?
About 26 inches in a normal winter, most of it in February.
When is the first frost in Diamondhead Lake?
In half of years the first 32° night comes by October 3, and the last spring frost by May 2.
What is the rainiest month in Diamondhead Lake?
May, with 5.1 inches of rain and melted snow. The year totals 35 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Diamondhead Lake itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Greenfield, IA (20 mi, snow) and Guthrie Ctr, IA (15 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.