Photo: Nyttend · Public domainIn Union Township, July heat, January chill and rainfall all sit near the middle of U.S. towns
On a normal July day the thermometer tops out near 83°. Summers stay cool: July afternoons here are cooler than in 68% of U.S. towns. The latest 30-year average runs 1.0° warmer than 1901–2000’s, with December up the most. Plan time outside from May to October, when highs sit at 64–83°.
A year in Union Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Union Township’s climate
Compared with towns across the U.S., with Union Township’s place in Ohio beside it.
What a year in Union Township 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 24 and the first by October 19. Frost and day counts come from NOAA’s station at Urbana Wwtp, OH, 8 miles from the town’s center, 160 ft lower.
The 2023 USDA map puts Union Township’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −7°. 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 Marysville, OH, is heaviest from January through February, about 7 inches a month. Precipitation (rain plus melted snow) adds up to 42 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 126 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Union Township
87% 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 Urbana Wwtp, OH.
Living with Union Township’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 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 19.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Union Township from natural hazards, river flooding is the largest share (65%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Union Township and its neighbors
Every town next door is within a degree of Union Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Union Township’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 |
|---|---|---|---|---|
| Union Township, OH | 20° | 83° | 42" | 24" |
| Monroeville, PA | 21° | 83° | 42" | 25" |
| Frankfort, IN | 18° | 84° | 43" | 24" |
| Calumet City, IL | 18° | 84° | 39" | 28" |
| Kinderhook, NY | 16° | 84° | 42" | 31" |
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 Union Township averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.2°).
A smaller shift than in 79% 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 Union Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Union Township’s place among Ohio’s.
Union Township weather by month
Highs, lows and precipitation from NOAA’s grid at Union Township’s center; snow, wet days and snow on the ground from Marysville, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 20° | 3.0" | 7.0" | 11 | 14 | 18° – 38° |
| February | 38° | 22° | 2.4" | 6.6" | 10 | 12 | 17° – 40° |
| March | 49° | 30° | 3.3" | 4.1" | 11 | 4 | 33° – 52° |
| April | 62° | 40° | 4.1" | 0.1" | 12 | 0 | 44° – 57° |
| May | 72° | 50° | 4.7" | 0.0" | 14 | 0 | 54° – 68° |
| June | 80° | 59° | 4.5" | 0.0" | 12 | 0 | 65° – 73° |
| July | 83° | 62° | 4.6" | 0.0" | 10 | 0 | 68° – 77° |
| August | 82° | 61° | 3.3" | 0.0" | 9 | 0 | 67° – 76° |
| September | 76° | 53° | 3.1" | 0.0" | 9 | 0 | 62° – 70° |
| October | 64° | 43° | 2.8" | 0.0" | 9 | 0 | 49° – 60° |
| November | 50° | 33° | 3.0" | 0.7" | 10 | 1 | 35° – 48° |
| December | 39° | 25° | 3.0" | 5.5" | 11 | 8 | 20° – 42° |
| Year | 61° | 41° | 41.8" | 24.0" | 126 | 38 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 17° to 40°. June is the most reliable, staying within 8°.
Where Union Township’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 Union Township’s center.
- Snow: Marysville, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Urbana Wwtp, OH, 8 miles from the town’s center, 160 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 Union Township’s climate
What is the weather like in Union Township?
A typical July afternoon reaches 83°, a January night drops to 20°, and about 24 inches of snow falls in a normal winter. Colder January nights than 61% of U.S. towns; cooler July afternoons than 68% of U.S. towns.
How cold does it get in Union Township in winter?
January nights average 20°. About 121 nights a year reach 32° or below and 4 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Union Township get?
About 24 inches in a normal winter at Marysville, OH, heaviest from January through February, about 7 inches a month, with snow on the ground about 38 days a year.
How hot does it get in Union Township?
July, with a typical high of 83° and a low of 62°. About 17 days a year reach 90° (Urbana Wwtp, OH).
When is the first and last frost in Union Township?
In half of years the last spring frost (32°) comes by April 24 and the first fall frost by October 19, about 179 frost-free days, at Urbana Wwtp, OH.
What growing zone is Union Township in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −7°.
What is the best time of year to visit Union Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Union Township getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 79% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Union Township.
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.