Photo: mostateparks · Public domainNeither notably warm, cold, wet nor dry, Leeton sits near the middle of U.S. towns
Peak summer warmth arrives in July, with afternoons near 88°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 67° apart. Its July heat outdoes that of 69% of U.S. towns. Keep the boiler serviced for the months from November to March, which average under 50°.
A year in Leeton at a glance
Each month’s typical high and low, and what it brings.
What stands out about Leeton’s climate
Compared with towns across the U.S., with Leeton’s place in Missouri beside it.
What a year in Leeton feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 202 frost-free days a year
In half of years the last 32° night comes by April 7 and the first by October 28. Day counts come from NOAA’s station at Windsor, MO, 10 miles from the town’s center, at about the same height; frost dates and degree days from Windsor, MO, 10 miles away.
The 2023 USDA map puts Leeton’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −4°. 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 11 inches of snow a winter
Snow, measured at Clinton, MO, falls mostly in January. Precipitation (rain plus melted snow) adds up to 42 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 102 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Leeton
77% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Windsor, MO.
Living with Leeton’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
202 frost-free days in zone 6b. The last frost comes by Apr 7 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 28.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Leeton from natural hazards, river flooding is the largest share (50%); heat waves, cold waves, winter storms and ice storms together are 30%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Leeton and similar climates
TownRatings has no climate map of the towns around Leeton yet.
Climates most like Leeton’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 |
|---|---|---|---|---|
| Leeton, MO | 22° | 88° | 42" | 11" |
| East Alton, IL | 23° | 88° | 42" | 11" |
| Lake of the Woods, VA | 25° | 88° | 44" | 11" |
| Hamilton, OH | 22° | 87° | 43" | 9.7" |
| Terre Haute, IN | 21° | 87° | 43" | 15" |
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 Leeton averaged 0.8° warmer than the 1900s. The biggest change is in January (+2.0°).
A smaller shift than in 90% 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 Leeton compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Leeton’s place among Missouri’s.
Leeton weather by month
Highs, lows and precipitation from NOAA’s grid at Leeton’s center; snow, wet days and snow on the ground from Clinton, MO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 40° | 22° | 1.5" | 4.6" | 6 | 6 | 24° – 42° |
| February | 45° | 26° | 2.0" | 2.1" | 6 | 3 | 26° – 45° |
| March | 56° | 34° | 2.8" | 2.0" | 10 | 1 | 38° – 58° |
| April | 66° | 44° | 4.6" | 0.1" | 11 | 0 | 49° – 61° |
| May | 75° | 54° | 5.5" | 0.0" | 12 | 0 | 60° – 74° |
| June | 84° | 64° | 5.1" | 0.0" | 10 | 0 | 70° – 78° |
| July | 88° | 68° | 4.5" | 0.0" | 8 | 0 | 73° – 85° |
| August | 87° | 66° | 3.6" | 0.0" | 8 | 0 | 70° – 81° |
| September | 80° | 57° | 4.2" | 0.0" | 8 | 0 | 63° – 75° |
| October | 68° | 45° | 3.4" | 0.0" | 9 | 0 | 51° – 63° |
| November | 55° | 35° | 2.8" | 0.3" | 7 | 0 | 37° – 52° |
| December | 44° | 25° | 2.1" | 2.0" | 7 | 2 | 20° – 41° |
| Year | 66° | 45° | 42.1" | 11.1" | 102 | 13 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 20° to 41°. June is the most reliable, staying within 8°.
Where Leeton’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 Leeton’s center.
- Snow: Clinton, MO.
- Frost dates, heating and cooling: Windsor, MO, 10 miles away.
- Freezing nights, 90° and 100° days: Windsor, MO, 10 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 Leeton’s climate
What is the weather like in Leeton?
A typical July afternoon reaches 88°, a January night drops to 22°, and about 11 inches of snow falls in a normal winter. Colder January nights than 52% of U.S. towns; hotter July afternoons than 69% of U.S. towns.
How cold does it get in Leeton in winter?
January nights average 22°. About 117 nights a year reach 32° or below and 5 reach 0° or below. In the coldest January of the last 30 years the month averaged 24°.
How much snow does Leeton get?
About 11 inches in a normal winter at Clinton, MO, most of it in January, with snow on the ground about 13 days a year.
How hot does it get in Leeton?
July, with a typical high of 88° and a low of 68°. About 25 days a year reach 90° and 2 reach 100° (Windsor, MO).
When is the first and last frost in Leeton?
In half of years the last spring frost (32°) comes by April 7 and the first fall frost by October 28, about 202 frost-free days, at Windsor, MO.
What growing zone is Leeton in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −4°.
What is the best time of year to visit Leeton?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Leeton getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 90% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Leeton.
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.