Bryan, Ohio climate: Normal weather by month, frost dates and records
Bryan's normal year runs from 17°F January nights to 85°F July afternoons, with 37.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.8°C, January lows of −9°C, July highs of 29°C, 949 mm of precipitation a year.
- NOAA stationBryan (2 mi SE)
- Station IDUSC00331042
- Location41.46°N 84.53°W
- Elevation730 ft (223 m)
- From the center1 miles
- Population8,601
On October 22, the normal high in Bryan is 61°F and the normal low 39°F, and the chance of measurable rain or snow is 39%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Bryan.
- Jan 32° 17°
- Feb 36° 18°
- Mar 46° 27°
- Apr 60° 37°
- May 71° 49°
- Jun 81° 59°
- Jul 85° 62°
- Aug 82° 60°
- Sep 76° 52°
- Oct 64° 41°
- Nov 49° 30°
- Dec 38° 23°
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 Bryan each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 17°F. The most precipitation falls in May (4.04 in), the least in February (2.16 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 32°F | 17°F | 24.4°F | 2.48 | 13 | <1 | 29 | 9 h 30 min |
| February | 36°F | 18°F | 26.7°F | 2.16 | 12 | <1 | 26 | 10 h 40 min |
| March | 46°F | 27°F | 36.8°F | 2.75 | 11 | <1 | 23 | 11 h 50 min |
| April | 60°F | 37°F | 48.2°F | 3.73 | 13 | <1 | 9 | 13 h 20 min |
| May | 71°F | 49°F | 60.2°F | 4.04 | 13 | 1 | <1 | 14 h 30 min |
| June | 81°F | 59°F | 69.9°F | 3.96 | 11 | 4 | <1 | 15 h 10 min |
| July | 85°F | 62°F | 73.5°F | 3.94 | 9 | 9 | <1 | 14 h 50 min |
| August | 82°F | 60°F | 71.1°F | 3.25 | 10 | 3 | <1 | 13 h 50 min |
| September | 76°F | 52°F | 64.3°F | 3.29 | 10 | 2 | <1 | 12 h 30 min |
| October | 64°F | 41°F | 52.3°F | 2.61 | 13 | <1 | 5 | 11 h 10 min |
| November | 49°F | 30°F | 39.5°F | 2.93 | 11 | <1 | 19 | 9 h 50 min |
| December | 38°F | 23°F | 30.0°F | 2.24 | 12 | <1 | 27 | 9 h 10 min |
| Year (annual) | 60°F | 40°F | 49.7°F | 37.38 | 138 | 20 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 0°C | −9°C | −4.2°C | 63 mm |
| February | 2°C | −8°C | −2.9°C | 55 mm |
| March | 8°C | −3°C | 2.7°C | 70 mm |
| April | 15°C | 3°C | 9.0°C | 95 mm |
| May | 22°C | 10°C | 15.7°C | 103 mm |
| June | 27°C | 15°C | 21.1°C | 101 mm |
| July | 29°C | 17°C | 23.1°C | 100 mm |
| August | 28°C | 16°C | 21.7°C | 83 mm |
| September | 25°C | 11°C | 17.9°C | 84 mm |
| October | 18°C | 5°C | 11.3°C | 66 mm |
| November | 9°C | −1°C | 4.2°C | 74 mm |
| December | 3°C | −5°C | −1.1°C | 57 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Montpelier (10 miles away), gets 33 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331042; 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 Bryan?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, July has the fewest days with rain (9).
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 USC00331042.
When is the last frost in Bryan?
In Bryan, the last spring frost (32°F) comes after April 26 in half of years and after May 11 in one year in ten; the first autumn frost comes before October 17 in half of years and before October 3 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 261 year in 10 after May 11; 9 in 10 after April 14
- First autumn frost, half of years before
- October 171 year in 10 before October 3; 9 in 10 before October 30
NOAA puts the median frost-free season at 170 days, and the season without a hard freeze (28°F) at 193 days.
A hard freeze (28°F) comes after April 17 in half of springs and before October 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Bryan in zone 6a in ZIP code 43506, the nearest ZIP area.
Frost dates for every NOAA station in Ohio · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00331042; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Bryan?
In a normal year in Bryan, 20 days a year reach 90°F (1 of them 100°F or more), 138 nights fall to 32°F or colder and 138 days bring measurable precipitation.
- Days at 90°F or more
- 20a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 138a normal year
- Days that stay below freezing
- 44high of 32°F or less
- Days with 0.01 inch of precipitation
- 138a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00331042.
How sunny is Bryan?
Over a year 72% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Bryan, 3.9 kWh per square metre a day. July is the sunniest month (81%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 58% | 1.6 |
| February | 63% | 2.5 |
| March | 65% | 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 | 56% | 1.4 |
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 Bryan need?
A normal year in Bryan brings 6,303 heating degree days, 17% more than the median U.S. place (5,373), and 779 cooling degree days, 14% 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 3,015 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,258 | 0 |
| February | 1,072 | 0 |
| March | 877 | 1 |
| April | 506 | 3 |
| May | 195 | 47 |
| June | 25 | 170 |
| July | 3 | 268 |
| August | 11 | 200 |
| September | 103 | 80 |
| October | 404 | 9 |
| November | 765 | 0 |
| December | 1,085 | 0 |
| Year (annual) | 6,303 | 779 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00331042. 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.
Has Bryan been warmer than normal lately?
2025 averaged 49.9°F, 0.2°F above the 1991-2020 normal of 49.7°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.0°F | +1.3°F | 39.58 |
| 2022 | 49.6°F | −0.1°F | 37.16 |
| 2023 | 51.9°F | +2.1°F | 31.14 |
| 2024 | 52.9°F | +3.2°F | 32.69 |
| 2025 | 49.9°F | +0.2°F | 31.45 |
Source: observed years: ACIS, station USC00331042. A year counts only with all twelve months complete.
How does Bryan's climate compare?
Bryan is warmer than 11 of the other 98 places with their own NOAA record in Ohio, and wetter than 13. Across the 7,247 U.S. stations with normals, its annual mean of 49.7°F is warmer than 39%.
In the Köppen classification computed from these normals, Bryan 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 Bryan share this climate record?
3 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.
- Stryker, OH1,238 people · 6 mi NE
- Ney, OH300 people · 6 mi S
- Pulaski, OH75 people · 4 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 Bryan's climate
What is the coldest month in Bryan?
January, with a normal high of 32°F and a normal low of 17°F. The warmest is July (85°F by day, 62°F at night).
Does it snow in Bryan?
Yes. NOAA publishes no 1991-2020 snowfall normal for Bryan's NOAA station; the nearest record that keeps one, Montpelier (10 miles away), records 33 inches of snow in a normal year.
What is the rainiest month in Bryan?
May, with 4.04 in of precipitation in a normal year; the driest is February with 2.16 in.
What plant hardiness zone is Bryan in?
The USDA's 2023 map puts Bryan in zone 6a in ZIP code 43506, the nearest ZIP area.
How late can frost come in Bryan?
In half of years the last 32°F night comes after April 26; in one year in ten it comes after May 11. Waiting until May 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Ohio climateThe statewide normals and every place in the state
- Montpelier, OH10 miles from this station, 49.1°F a year
- Defiance, OH10 miles from this station, 50.0°F a year
- Hicksville, OH17 miles from this station, 50.2°F a year
- Wauseon, OH20 miles from this station, 49.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made