Tiffin, Ohio climate: Normal weather by month, frost dates and records
Tiffin's normal year runs from 19°F January nights to 84°F July afternoons, with 38.7 inches of precipitation and 30 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.5°C, January lows of −7°C, July highs of 29°C, 983 mm of precipitation a year.
- NOAA stationTiffin
- Station IDUSC00338313
- Location41.12°N 83.17°W
- Elevation740 ft (226 m)
- From the centerunder 1 mile
- Population17,729
On October 23, the normal high in Tiffin is 61°F and the normal low 41°F, and the chance of measurable rain or snow is 34%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Tiffin.
- Jan 33° 19°
- Feb 36° 21°
- Mar 47° 29°
- Apr 60° 39°
- May 72° 50°
- Jun 81° 60°
- Jul 84° 64°
- Aug 83° 62°
- Sep 77° 54°
- Oct 64° 43°
- Nov 50° 33°
- Dec 38° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Tiffin each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 19°F. The most precipitation falls in June (4.20 in), the least in February (2.24 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 19°F | 26.0°F | 2.57 | 9.4 | 12 | <1 | 27 | 9 h 30 min |
| February | 36°F | 21°F | 28.4°F | 2.24 | 6.8 | 10 | <1 | 25 | 10 h 40 min |
| March | 47°F | 29°F | 37.6°F | 2.73 | 4.9 | 11 | <1 | 21 | 11 h 50 min |
| April | 60°F | 39°F | 49.4°F | 3.82 | 0.6 | 13 | <1 | 7 | 13 h 20 min |
| May | 72°F | 50°F | 61.0°F | 4.10 | 0.0 | 13 | 1 | <1 | 14 h 30 min |
| June | 81°F | 60°F | 70.2°F | 4.20 | 0.0 | 11 | 4 | <1 | 15 h 10 min |
| July | 84°F | 64°F | 73.7°F | 3.91 | 0.0 | 11 | 5 | <1 | 14 h 50 min |
| August | 83°F | 62°F | 72.1°F | 3.54 | 0.0 | 8 | 4 | <1 | 13 h 50 min |
| September | 77°F | 54°F | 65.5°F | 3.32 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 64°F | 43°F | 53.3°F | 2.76 | 0.0 | 10 | <1 | 3 | 11 h 10 min |
| November | 50°F | 33°F | 41.5°F | 2.89 | 0.9 | 10 | <1 | 15 | 10 h |
| December | 38°F | 25°F | 31.3°F | 2.61 | 6.9 | 11 | <1 | 25 | 9 h 10 min |
| Year (annual) | 60°F | 42°F | 50.9°F | 38.69 | 29.5 | 130 | 16 | 123 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −7°C | −3.3°C | 65 mm | 24 cm |
| February | 2°C | −6°C | −2.0°C | 57 mm | 17 cm |
| March | 8°C | −2°C | 3.1°C | 69 mm | 12 cm |
| April | 16°C | 4°C | 9.7°C | 97 mm | 2 cm |
| May | 22°C | 10°C | 16.1°C | 104 mm | 0 cm |
| June | 27°C | 16°C | 21.2°C | 107 mm | 0 cm |
| July | 29°C | 18°C | 23.2°C | 99 mm | 0 cm |
| August | 28°C | 17°C | 22.3°C | 90 mm | 0 cm |
| September | 25°C | 12°C | 18.6°C | 84 mm | 0 cm |
| October | 18°C | 6°C | 11.8°C | 70 mm | 0 cm |
| November | 10°C | 1°C | 5.3°C | 73 mm | 2 cm |
| December | 3°C | −4°C | −0.4°C | 66 mm | 18 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00338313; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Tiffin?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August has the fewest days with rain (8).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00338313.
When is the last frost in Tiffin?
In Tiffin, the last spring frost (32°F) comes after April 23 in half of years and after May 7 in one year in ten; the first autumn frost comes before October 23 in half of years and before October 9 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 231 year in 10 after May 7; 9 in 10 after April 8
- First autumn frost, half of years before
- October 231 year in 10 before October 9; 9 in 10 before November 5
NOAA puts the median frost-free season at 184 days, and the season without a hard freeze (28°F) at 207 days.
A hard freeze (28°F) comes after April 11 in half of springs and before November 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tiffin in zone 6a in ZIP code 44883, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Tiffin's NOAA station is in zone 6b: the coldest night of a typical year reaches −5°F (20 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Ohio · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00338313; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Tiffin?
In a normal year in Tiffin, 16 days a year reach 90°F, 123 nights fall to 32°F or colder and 130 days bring measurable precipitation.
- Days at 90°F or more
- 16a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 123a normal year
- Days that stay below freezing
- 43high of 32°F or less
- Days with 0.01 inch of precipitation
- 130a normal year
- Days with 1 inch of snow or more
- 12a normal year
The highest temperature in this station's record (since 1893) is 106°F, on July 24, 1934; the lowest is −21°F, on January 20, 1994.
The wettest calendar year on that record is 1950, with 52.10 in; the snowiest season is 1977–78, with 60.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00338313; records: ACIS (NOAA Regional Climate Centers), station USC00338313. Records use complete months only; a month missing more than three days is left out.
How sunny is Tiffin?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Tiffin, 3.8 kWh per square metre a day. July is the sunniest month (81%) and December the cloudiest (55%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 56% | 1.6 |
| February | 62% | 2.5 |
| March | 64% | 3.5 |
| April | 69% | 4.7 |
| May | 71% | 5.5 |
| June | 77% | 6.2 |
| July | 81% | 6.2 |
| August | 80% | 5.4 |
| September | 78% | 4.4 |
| October | 69% | 2.9 |
| November | 65% | 1.9 |
| December | 55% | 1.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Tiffin need?
A normal year in Tiffin brings 5,992 heating degree days, 12% more than the median U.S. place (5,373), and 873 cooling degree days, 4% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,194 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,209 | 0 |
| February | 1,023 | 0 |
| March | 849 | 1 |
| April | 478 | 8 |
| May | 186 | 60 |
| June | 33 | 189 |
| July | 3 | 274 |
| August | 7 | 228 |
| September | 83 | 98 |
| October | 375 | 14 |
| November | 704 | 0 |
| December | 1,043 | 0 |
| Year (annual) | 5,992 | 873 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00338313. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Tiffin's climate compare?
Tiffin is warmer than 37 of the other 98 places with their own NOAA record in Ohio, and wetter than 22. Across the 7,247 U.S. stations with normals, its annual mean of 50.9°F is warmer than 44%.
In the Köppen classification computed from these normals, Tiffin is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Tiffin share this climate record?
9 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Fostoria, OH13,063 people · 13 mi W
- Attica, OH870 people · 15 mi E
- Bloomville, OH854 people · 9 mi SE
- Republic, OH544 people · 8 mi E
- McCutchenville, OH410 people · 10 mi SW
- New Riegel, OH280 people · 9 mi SW
- Bascom, OH267 people · 6 mi W
- Melmore, OH99 people · 7 mi SE
- Fort Seneca, OH89 people · 6 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Tiffin's climate
What is the coldest month in Tiffin?
January, with a normal high of 33°F and a normal low of 19°F. The warmest is July (84°F by day, 64°F at night).
Does it snow in Tiffin?
Yes: 30 inches in a normal year, falling on 18 days with 0.1 inch or more, the most in January (9.4 inches).
What is the rainiest month in Tiffin?
June, with 4.20 in of precipitation in a normal year; the driest is February with 2.24 in.
What plant hardiness zone is Tiffin in?
The USDA's 2023 map puts Tiffin in zone 6a in ZIP code 44883, the nearest ZIP area. By the same method at Tiffin's NOAA station, the coldest night of a typical year reaches −5°F (20 years, 1991-2020): zone 6b.
How late can frost come in Tiffin?
In half of years the last 32°F night comes after April 23; in one year in ten it comes after May 7. Waiting until May 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Ohio climateThe statewide normals and every place in the state
- Fremont, OH15 miles from this station, 50.7°F a year
- Upper Sandusky, OH21 miles from this station, 50.1°F a year
- Bucyrus, OH24 miles from this station, 52.3°F a year
- Findlay, OH27 miles from this station, 52.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made