Weather without surprises: Meredosia keeps close to the norm for U.S. towns
On a normal July day the thermometer tops out near 87°. By precipitation alone, it ranks drier than 68% of U.S. towns. Since 1901–2000, the year has warmed by 0.7°, most of all in December. Plan time outside from April to June and September to October, when highs sit at 65–84°.
A year in Meredosia at a glance
Each month’s typical high and low, and what it brings.
What stands out about Meredosia’s climate
Compared with towns across the U.S., with Meredosia’s place in Illinois beside it.
What a year in Meredosia feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 179 frost-free days a year
In half of years the last 32° night comes by April 18 and the first by October 15. Frost and day counts come from NOAA’s station at Perry 6 Nw, IL, 14 miles from the town’s center, 200 ft higher.
The 2023 USDA map puts Meredosia’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. 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 21 inches of snow a winter
Snow, measured at Perry 6 Nw, IL, is heaviest from January through February, about 6 inches a month. Precipitation (rain plus melted snow) adds up to 38 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 113 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Meredosia
82% of the work is heating. Months averaging under 55° run from November 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 Perry 6 Nw, IL.
Living with Meredosia’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
179 frost-free days in zone 6a. The last frost comes by Apr 18 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 15.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 0.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Meredosia from natural hazards, river flooding is the largest share (44%); heat waves, cold waves, winter storms and ice storms together are 29%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Meredosia and its neighbors
Every town next door is within a degree of Meredosia in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Meredosia’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 |
|---|---|---|---|---|
| Meredosia, IL | 19° | 87° | 38" | 21" |
| St. Joseph, MO | 18° | 87° | 37" | 21" |
| Atchison, KS | 19° | 88° | 37" | 17" |
| Strasburg, VA | 23° | 87° | 39" | 21" |
| Martinsburg, WV | 23° | 87° | 40" | 23" |
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.
Warmer than it used to be
The last 30 years in Meredosia averaged 0.7° warmer than the 1900s. The biggest change is in December (+2.0°).
A smaller shift than in 92% 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 Meredosia compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Meredosia’s place among Illinois’.
Meredosia weather by month
Highs, lows and precipitation from NOAA’s grid at Meredosia’s center; snow, wet days and snow on the ground from Perry 6 Nw, IL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 36° | 19° | 2.0" | 6.1" | 9 | 12 | 21° – 39° |
| February | 41° | 23° | 1.9" | 6.0" | 8 | 8 | 20° – 43° |
| March | 53° | 32° | 2.6" | 2.4" | 10 | 3 | 35° – 56° |
| April | 65° | 42° | 3.9" | 0.4" | 12 | 0 | 46° – 60° |
| May | 75° | 53° | 4.7" | 0.0" | 13 | 0 | 59° – 74° |
| June | 84° | 62° | 4.6" | 0.0" | 11 | 0 | 69° – 78° |
| July | 87° | 66° | 3.7" | 0.0" | 9 | 0 | 71° – 83° |
| August | 86° | 63° | 3.4" | 0.0" | 9 | 0 | 69° – 80° |
| September | 80° | 55° | 3.4" | 0.0" | 8 | 0 | 62° – 73° |
| October | 67° | 44° | 3.1" | 0.0" | 9 | 0 | 50° – 61° |
| November | 53° | 33° | 2.7" | 0.9" | 8 | 1 | 36° – 51° |
| December | 41° | 24° | 2.0" | 5.1" | 9 | 8 | 18° – 41° |
| Year | 64° | 43° | 38.0" | 20.9" | 113 | 31 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 18° to 41°. June is the most reliable, staying within 9°.
Where Meredosia’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 Meredosia’s center.
- Snow: Perry 6 Nw, IL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Perry 6 Nw, IL, 14 miles from the town’s center, 200 ft higher; 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 Meredosia’s climate
What is the weather like in Meredosia?
A typical July afternoon reaches 87°, a January night drops to 19°, and about 21 inches of snow falls in a normal winter. Colder January nights than 64% of U.S. towns; hotter July afternoons than 63% of U.S. towns.
How cold does it get in Meredosia in winter?
January nights average 19°. About 126 nights a year reach 32° or below and 7 reach 0° or below. In the coldest January of the last 30 years the month averaged 21°.
How much snow does Meredosia get?
About 21 inches in a normal winter at Perry 6 Nw, IL, heaviest from January through February, about 6 inches a month, with snow on the ground about 31 days a year.
How hot does it get in Meredosia?
July, with a typical high of 87° and a low of 66°. About 31 days a year reach 90° and 1 reach 100° (Perry 6 Nw, IL).
When is the first and last frost in Meredosia?
In half of years the last spring frost (32°) comes by April 18 and the first fall frost by October 15, about 179 frost-free days, at Perry 6 Nw, IL.
What growing zone is Meredosia in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Meredosia?
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 Meredosia getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Meredosia.
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.