Photo: Nyttend · Public domainFor weather, Merom is about as ordinary as U.S. towns get
Expect July afternoons of about 87°. The wettest month is June; the driest is February. In July, afternoons here are warmer than in 62% of U.S. towns. Garden planting can start around April 12; autumn frost returns near October 22.
A year in Merom at a glance
Each month’s typical high and low, and what it brings.
What stands out about Merom’s climate
Compared with towns across the U.S., with Merom’s place in Indiana beside it.
What a year in Merom feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 193 frost-free days a year
In half of years the last 32° night comes by April 12 and the first by October 22. Frost and day counts come from NOAA’s station at Palestine, IL, 5 miles from the town’s center, 110 ft lower.
The 2023 USDA map puts Merom’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 10 inches of snow a winter
Snow, measured at Hutsonville, IL, falls mostly in January. Precipitation (rain plus melted snow) adds up to 45 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 109 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Merom
80% 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 Palestine, IL.
Living with Merom’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
193 frost-free days in zone 6b. The last frost comes by Apr 12 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 22.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Merom from natural hazards, river flooding is the largest share (44%); heat waves, cold waves, winter storms and ice storms together are 12%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Merom and similar climates
TownRatings has no climate map of the towns around Merom yet.
Climates most like Merom’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 |
|---|---|---|---|---|
| Merom, IN | 22° | 87° | 45" | 9.8" |
| Park Hills, MO | 22° | 87° | 46" | 8.7" |
| Hamilton, OH | 22° | 87° | 43" | 9.7" |
| Parkersburg, WV | 24° | 86° | 44" | 11" |
| Audubon, PA | 23° | 88° | 47" | 7.6" |
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 Merom averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.2°).
A smaller shift than in 64% 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 Merom compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Merom’s place among Indiana’s.
Merom weather by month
Highs, lows and precipitation from NOAA’s grid at Merom’s center; snow, wet days and snow on the ground from Hutsonville, IL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 38° | 22° | 3.0" | 3.4" | 8 | 23° – 41° |
| February | 43° | 25° | 2.4" | 2.6" | 8 | 21° – 43° |
| March | 54° | 34° | 3.5" | 1.2" | 11 | 36° – 57° |
| April | 66° | 44° | 4.9" | 0.0" | 12 | 48° – 60° |
| May | 76° | 54° | 5.0" | 0.0" | 12 | 59° – 74° |
| June | 84° | 63° | 5.0" | 0.0" | 10 | 69° – 77° |
| July | 87° | 66° | 4.4" | 0.0" | 9 | 71° – 84° |
| August | 86° | 64° | 3.2" | 0.0" | 7 | 70° – 80° |
| September | 80° | 56° | 3.3" | 0.0" | 7 | 64° – 73° |
| October | 68° | 45° | 3.8" | 0.1" | 8 | 52° – 62° |
| November | 54° | 35° | 3.7" | 0.0" | 9 | 37° – 51° |
| December | 42° | 26° | 3.0" | 2.5" | 9 | 21° – 44° |
| Year | 65° | 44° | 45.2" | 9.8" | 109 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 21° to 44°. June is the most reliable, staying within 8°.
Where Merom’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 Merom’s center.
- Snow: Hutsonville, IL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Palestine, IL, 5 miles from the town’s center, 110 ft lower; 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 Merom’s climate
What is the weather like in Merom?
A typical July afternoon reaches 87°, a January night drops to 22°, and about 10 inches of snow falls in a normal winter. Milder January nights than 50% of U.S. towns; hotter July afternoons than 62% of U.S. towns.
How cold does it get in Merom in winter?
January nights average 22°. About 101 nights a year reach 32° or below and 3 reach 0° or below. In the coldest January of the last 30 years the month averaged 23°.
How much snow does Merom get?
About 9.8 inches in a normal winter at Hutsonville, IL, most of it in January.
How hot does it get in Merom?
July, with a typical high of 87° and a low of 66°. About 38 days a year reach 90° (Palestine, IL).
When is the first and last frost in Merom?
In half of years the last spring frost (32°) comes by April 12 and the first fall frost by October 22, about 193 frost-free days, at Palestine, IL.
What growing zone is Merom 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 Merom?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Merom getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 64% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Merom.
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.