Photo: Nyttend · Public domainDry weather: only 37 inches of rain and melted snow a year in Tiffin Township, less than in 73% of U.S. towns
The depth of winter brings overnight lows near 18°. By January nights alone, it runs colder than 68% of U.S. towns. Since 1901–2000, the year has warmed by 1.2°, most of all in February. From May to June and August to October, highs of 63–82° make it easy to spend the day outdoors.
A year in Tiffin Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Tiffin Township’s climate
Compared with towns across the U.S., with Tiffin Township’s place in Ohio beside it.
What a year in Tiffin Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 170 frost-free days a year
In half of years the last 32° night comes by April 28 and the first by October 17. Frost and day counts come from NOAA’s station at Defiance Mem Airport, 3 miles from the town’s center, at about the same height.
The 2023 USDA map puts Tiffin Township’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 24 inches of snow a winter
Snow, measured at Defiance, OH, is heaviest from January through February, about 8 inches a month. Precipitation (rain plus melted snow) adds up to 37 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 132 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Tiffin Township
89% 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 Defiance Mem Airport.
Living with Tiffin Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
170 frost-free days in zone 6a. The last frost comes by Apr 28 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 17.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October. 1.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Tiffin Township from natural hazards, river flooding is the largest share (65%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Tiffin Township and its neighbors
Every town next door is within a degree of Tiffin Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Tiffin 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 |
|---|---|---|---|---|
| Tiffin Township, OH | 18° | 85° | 37" | 24" |
| Coal City, IL | 16° | 85° | 38" | 25" |
| Munster, IN | 17° | 84° | 39" | 27" |
| Burlington, IA | 16° | 86° | 38" | 22" |
| Huntingdon, PA | 21° | 85° | 40" | 26" |
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 Tiffin Township averaged 1.2° warmer than the 1900s. The biggest change is in February (+2.4°).
A smaller shift than in 60% 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 Tiffin Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Tiffin Township’s place among Ohio’s.
Tiffin Township weather by month
Highs, lows and precipitation from NOAA’s grid at Tiffin Township’s center; snow, wet days and snow on the ground from Defiance, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 33° | 18° | 2.3" | 8.7" | 12 | 14 | 16° – 37° |
| February | 36° | 21° | 2.0" | 8.0" | 10 | 11 | 14° – 38° |
| March | 47° | 29° | 2.5" | 2.6" | 11 | 4 | 29° – 52° |
| April | 60° | 39° | 3.5" | 0.2" | 13 | 0 | 43° – 55° |
| May | 72° | 49° | 4.1" | 0.0" | 13 | 0 | 53° – 67° |
| June | 81° | 59° | 3.8" | 0.0" | 11 | 0 | 65° – 74° |
| July | 85° | 62° | 3.8" | 0.0" | 10 | 0 | 68° – 80° |
| August | 82° | 61° | 3.8" | 0.0" | 9 | 0 | 67° – 77° |
| September | 76° | 53° | 3.0" | 0.0" | 9 | 0 | 60° – 69° |
| October | 63° | 43° | 2.8" | 0.0" | 11 | 0 | 49° – 60° |
| November | 49° | 33° | 2.8" | 0.9" | 11 | 2 | 34° – 47° |
| December | 37° | 24° | 2.4" | 3.8" | 12 | 8 | 18° – 41° |
| Year | 60° | 41° | 36.6" | 24.2" | 132 | 38 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 14° to 38°. September is the most reliable, staying within 9°.
Where Tiffin 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 Tiffin Township’s center.
- Snow: Defiance, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Defiance Mem Airport, 3 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 Tiffin Township’s climate
What is the weather like in Tiffin Township?
A typical July afternoon reaches 85°, a January night drops to 18°, and about 24 inches of snow falls in a normal winter. Colder January nights than 68% of U.S. towns; cooler July afternoons than 54% of U.S. towns.
How cold does it get in Tiffin Township in winter?
January nights average 18°. 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 16°.
How much snow does Tiffin Township get?
About 24 inches in a normal winter at Defiance, OH, heaviest from January through February, about 8 inches a month, with snow on the ground about 38 days a year.
How hot does it get in Tiffin Township?
July, with a typical high of 85° and a low of 62°. About 16 days a year reach 90° (Defiance Mem Airport).
When is the first and last frost in Tiffin Township?
In half of years the last spring frost (32°) comes by April 28 and the first fall frost by October 17, about 170 frost-free days, at Defiance Mem Airport.
What growing zone is Tiffin Township 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 Tiffin Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Tiffin Township getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 60% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Tiffin 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.