Photo: PopePompus · CC BY-SA 4.0Nights turn raw in Conesville each January, colder than in 89% of U.S. towns
Expect July afternoons of about 85°. It is a dry place: less rain and snow fall here than on 70% of U.S. towns. Compared with 1901–2000, the average now sits 0.7° higher. Seedlings are safe outdoors from about April 26, with the first autumn frost due around October 10.
A year in Conesville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Conesville’s climate
Compared with towns across the U.S., with Conesville’s place in Iowa beside it.
What a year in Conesville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 167 frost-free days a year
In half of years the last 32° night comes by April 26 and the first by October 10. Frost and day counts come from NOAA’s station at Columbus Junction, IA, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Conesville’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −12°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 24 inches of snow a winter
Snow, measured at Muscatine, IA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 38 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 116 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Conesville
89% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Columbus Junction, IA.
Living with Conesville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
167 frost-free days in zone 5b. The last frost comes by Apr 26 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 10.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Conesville from natural hazards, river flooding is the largest share (52%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Conesville and similar climates
TownRatings has no climate map of the towns around Conesville yet.
Climates most like Conesville’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Conesville, IA | 13° | 85° | 38" | 24" |
| Morris, IL | 16° | 85° | 38" | 25" |
| Schererville, IN | 17° | 84° | 39" | 27" |
| Bellevue, NE | 14° | 86° | 33" | 25" |
| Defiance, OH | 19° | 85° | 37" | 24" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Conesville averaged 0.7° warmer than the 1900s. The biggest change is in December (+1.8°).
A smaller shift than in 94% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Conesville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Conesville’s place among Iowa’s.
Conesville weather by month
Highs, lows and precipitation from NOAA’s grid at Conesville’s center; snow, wet days and snow on the ground from Muscatine, IA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 13° | 1.2" | 7.0" | 8 | 16 | 14° – 35° |
| February | 36° | 17° | 1.6" | 5.8" | 8 | 11 | 13° – 38° |
| March | 49° | 28° | 2.3" | 2.8" | 9 | 3 | 30° – 53° |
| April | 62° | 39° | 3.6" | 0.7" | 11 | 0 | 40° – 58° |
| May | 73° | 51° | 5.0" | 0.0" | 13 | 0 | 56° – 68° |
| June | 82° | 61° | 5.2" | 0.0" | 12 | 0 | 69° – 75° |
| July | 85° | 64° | 4.2" | 0.0" | 9 | 0 | 69° – 81° |
| August | 83° | 62° | 4.0" | 0.0" | 10 | 0 | 67° – 78° |
| September | 77° | 53° | 3.7" | 0.0" | 8 | 0 | 60° – 70° |
| October | 64° | 41° | 2.9" | 0.2" | 10 | 0 | 48° – 58° |
| November | 49° | 30° | 2.2" | 0.8" | 8 | 1 | 31° – 50° |
| December | 36° | 19° | 1.7" | 6.2" | 9 | 8 | 13° – 37° |
| Year | 61° | 40° | 37.5" | 23.5" | 116 | 39 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 13° to 38°. June is the most reliable, staying within 6°.
Where Conesville’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Conesville’s center.
- Snow: Muscatine, IA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Columbus Junction, IA, 7 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Conesville’s climate
What is the weather like in Conesville?
A typical July afternoon reaches 85°, a January night drops to 13°, and about 24 inches of snow falls in a normal winter. Colder January nights than 89% of U.S. towns; hotter July afternoons than 51% of U.S. towns.
How cold does it get in Conesville in winter?
January nights average 13°. About 134 nights a year reach 32° or below and 11 reach 0° or below. In the coldest January of the last 30 years the month averaged 14°.
How much snow does Conesville get?
About 24 inches in a normal winter at Muscatine, IA, most of it in January, with snow on the ground about 39 days a year.
How hot does it get in Conesville?
July, with a typical high of 85° and a low of 64°. About 17 days a year reach 90° (Columbus Junction, IA).
When is the first and last frost in Conesville?
In half of years the last spring frost (32°) comes by April 26 and the first fall frost by October 10, about 167 frost-free days, at Columbus Junction, IA.
What growing zone is Conesville in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −12°.
What is the best time of year to visit Conesville?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Conesville getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 94% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Conesville.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.