Haddam has chilly winters and warm summers
A typical July afternoon reaches 89°, a January night drops to 16°, and about 19 inches of snow falls in a normal winter.
A year in Haddam at a glance
Each month’s typical high and low, and what it brings.
What stands out about Haddam’s climate
Read from where Haddam sits among Kansas’s towns. The page puts what stands out first.
About 171 frost-free days a year
In half of years the last 32° night comes by April 24 and the first by October 14.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Warmer than it used to be
The last 30 years in Haddam averaged 1.2° warmer than the 1900s. The biggest change is in March (+2.7°).
A smaller shift than in 54% of U.S. towns.
Change by month
19 inches of snow, 30 of rain and melt
May is the wettest month and January the driest. Rain or snow falls on about 77 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Living with Haddam’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
171 frost-free days. The last frost comes by Apr 24 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 14.
About 19" a winter over 5 days with an inch or more, most in January.
Months averaging under 55° run from October through April. Heating is 81% of the year’s heating-and-cooling load.
About 55 days a year reach 90°, and July afternoons average 89°.
The nicest months are May, September and October. 1.8 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →What a year in Haddam feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Haddam and its neighbors
Mill Creek has the coldest January nights next door (17°) and Mill Creek the hottest July afternoons (90°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
How Haddam compares
Against every U.S. town on TownTapestry, each counted once, with its place in Kansas.
Haddam 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 | 37° | 16° | 0.7" | 6.6" | 4 | 21° – 39° |
| February | 43° | 20° | 1.0" | 5.1" | 4 | 21° – 40° |
| March | 54° | 30° | 1.7" | 1.3" | 6 | 34° – 55° |
| April | 65° | 40° | 2.8" | 0.2" | 8 | 44° – 58° |
| May | 75° | 51° | 4.6" | 0 | 10 | 56° – 70° |
| June | 85° | 62° | 4.3" | 0 | 8 | 68° – 78° |
| July | 89° | 66° | 4.3" | 0 | 8 | 73° – 83° |
| August | 87° | 64° | 3.5" | 0 | 8 | 70° – 82° |
| September | 80° | 55° | 2.9" | 0 | 6 | 61° – 74° |
| October | 67° | 42° | 2.2" | 0.1" | 6 | 47° – 59° |
| November | 52° | 29° | 1.3" | 1.2" | 5 | 32° – 49° |
| December | 40° | 20° | 1.0" | 4.2" | 4 | 18° – 35° |
| Year | 65° | 41° | 30.3" | 18.7" | 77 |
Heating and cooling a home in Haddam
81% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 34° to 55°. July is the most reliable, staying within 10°.
Common questions about Haddam’s climate
What is the coldest month in Haddam?
January, with a typical high of 37° and a low of 16°.
What is the hottest month in Haddam?
July, with a typical high of 89° and a low of 66°. About 55 days a year reach 90°.
How much snow does Haddam get?
About 19 inches in a normal winter, most of it in January.
When is the first frost in Haddam?
In half of years the first 32° night comes by October 14, and the last spring frost by April 24.
What is the rainiest month in Haddam?
May, with 4.6 inches of rain and melted snow. The year totals 30 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Haddam.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Haddam itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Haddam, KS (1 mi, snow) and Washington, KS (14 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. Today’s forecast: National Weather Service.