Photo: Troypoling27 · CC BY-SA 4.0A middle-of-the-road climate: Union City is close to most U.S. towns on every count
The depth of winter brings overnight lows near 19°. In January, nights here are colder than in 66% of U.S. towns. December has warmed most since 1901–2000, part of a 1.1° rise. For walks and days out, the stretch from May to October brings highs of 64–84°.
A year in Union City at a glance
Each month’s typical high and low, and what it brings.
What stands out about Union City’s climate
Compared with towns across the U.S., with Union City’s place in Indiana beside it.
What a year in Union City feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 183 frost-free days a year
In half of years the last 32° night comes by April 20 and the first by October 21. Frost and day counts come from NOAA’s station at Winchester Airport 3 E, 6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Union City’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −8°. 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 25 inches of snow a winter
Snow, measured at Ridgeville 3 Sse, IN, falls mostly in January. Precipitation (rain plus melted snow) adds up to 41 inches a year; June is the wettest month and February 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 Union City
88% 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 Winchester Airport 3 E.
Living with Union City’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
183 frost-free days in zone 6a. The last frost comes by Apr 20 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 21.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 0.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Union City from natural hazards, river flooding is the largest share (57%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Union City and similar climates
TownRatings has no climate map of the towns around Union City yet.
Climates most like Union City’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 City, IN | 19° | 84° | 41" | 25" |
| Struthers, OH | 19° | 84° | 41" | 28" |
| Ellwood City, PA | 20° | 84° | 42" | 28" |
| Calumet City, IL | 18° | 84° | 39" | 28" |
| Kinderhook, NY | 16° | 84° | 42" | 31" |
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 Union City averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.2°).
A smaller shift than in 68% 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 City compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Union City’s place among Indiana’s.
Union City weather by month
Highs, lows and precipitation from NOAA’s grid at Union City’s center; snow, wet days and snow on the ground from Ridgeville 3 Sse, IN. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 34° | 19° | 2.7" | 7.2" | 12 | 18° – 38° |
| February | 38° | 22° | 2.3" | 6.4" | 10 | 17° – 41° |
| March | 49° | 30° | 3.2" | 4.3" | 11 | 33° – 53° |
| April | 62° | 39° | 4.0" | 0.5" | 11 | 44° – 57° |
| May | 72° | 50° | 4.3" | 0.0" | 12 | 55° – 68° |
| June | 81° | 59° | 4.7" | 0.0" | 11 | 64° – 73° |
| July | 84° | 62° | 4.0" | 0.0" | 8 | 68° – 78° |
| August | 82° | 60° | 3.5" | 0.0" | 7 | 66° – 76° |
| September | 76° | 53° | 3.0" | 0.0" | 7 | 61° – 70° |
| October | 64° | 43° | 2.9" | 0.1" | 8 | 49° – 59° |
| November | 50° | 32° | 3.2" | 0.9" | 9 | 33° – 48° |
| December | 38° | 24° | 2.8" | 5.7" | 11 | 18° – 43° |
| Year | 61° | 41° | 40.6" | 25.1" | 116 |
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 43°. June is the most reliable, staying within 9°.
Where Union City’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 City’s center.
- Snow: Ridgeville 3 Sse, IN.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Winchester Airport 3 E, 6 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 Union City’s climate
What is the weather like in Union City?
A typical July afternoon reaches 84°, a January night drops to 19°, and about 25 inches of snow falls in a normal winter. Colder January nights than 66% of U.S. towns; cooler July afternoons than 65% of U.S. towns.
How cold does it get in Union City in winter?
January nights average 19°. About 124 nights a year reach 32° or below and 6 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Union City get?
About 25 inches in a normal winter at Ridgeville 3 Sse, IN, most of it in January.
How hot does it get in Union City?
July, with a typical high of 84° and a low of 62°. About 9 days a year reach 90° (Winchester Airport 3 E).
When is the first and last frost in Union City?
In half of years the last spring frost (32°) comes by April 20 and the first fall frost by October 21, about 183 frost-free days, at Winchester Airport 3 E.
What growing zone is Union City in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −8°.
What is the best time of year to visit Union City?
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 City getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 68% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Union City.
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.