Hiram, Ohio climate: Normal weather by month, frost dates and records
Hiram's normal year runs from 16°F January nights to 81°F July afternoons, with 44.1 inches of precipitation and 63 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.9°C, January lows of −9°C, July highs of 27°C, 1,120 mm of precipitation a year.
- NOAA stationHiram
- Station IDUSC00333780
- Location41.31°N 81.01°W
- Elevation1,230 ft (375 m)
- From the center7 miles
- Population971
On October 23, the normal high in Hiram is 58°F and the normal low 38°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 Hiram.
- Jan 33° 16°
- Feb 35° 17°
- Mar 44° 25°
- Apr 58° 36°
- May 69° 47°
- Jun 77° 56°
- Jul 81° 60°
- Aug 80° 58°
- Sep 73° 52°
- Oct 61° 41°
- Nov 48° 31°
- Dec 37° 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 Hiram each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 16°F. The most precipitation falls in July (4.31 in), the least in February (2.70 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 16°F | 24.2°F | 3.34 | 20.4 | 17 | <1 | 28 | 9 h 30 min |
| February | 35°F | 17°F | 26.0°F | 2.70 | 12.5 | 13 | <1 | 26 | 10 h 40 min |
| March | 44°F | 25°F | 34.4°F | 3.42 | 9.9 | 12 | <1 | 24 | 11 h 50 min |
| April | 58°F | 36°F | 46.8°F | 4.01 | 0.7 | 13 | <1 | 10 | 13 h 20 min |
| May | 69°F | 47°F | 57.8°F | 4.06 | 0.0 | 13 | <1 | 1 | 14 h 30 min |
| June | 77°F | 56°F | 66.4°F | 4.19 | 0.0 | 13 | 1 | <1 | 15 h 10 min |
| July | 81°F | 60°F | 70.4°F | 4.31 | 0.0 | 11 | 2 | <1 | 14 h 50 min |
| August | 80°F | 58°F | 68.9°F | 3.70 | 0.0 | 10 | 1 | <1 | 13 h 50 min |
| September | 73°F | 52°F | 62.4°F | 4.04 | 0.0 | 10 | <1 | <1 | 12 h 30 min |
| October | 61°F | 41°F | 50.7°F | 3.77 | 0.3 | 12 | <1 | 4 | 11 h 10 min |
| November | 48°F | 31°F | 39.6°F | 3.17 | 5.3 | 12 | <1 | 18 | 9 h 50 min |
| December | 37°F | 23°F | 29.9°F | 3.39 | 13.8 | 14 | <1 | 26 | 9 h 10 min |
| Year (annual) | 58°F | 38°F | 48.1°F | 44.10 | 62.9 | 148 | 4 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −9°C | −4.3°C | 85 mm | 52 cm |
| February | 2°C | −8°C | −3.3°C | 69 mm | 32 cm |
| March | 7°C | −4°C | 1.3°C | 87 mm | 25 cm |
| April | 14°C | 2°C | 8.2°C | 102 mm | 2 cm |
| May | 21°C | 8°C | 14.3°C | 103 mm | 0 cm |
| June | 25°C | 13°C | 19.1°C | 106 mm | 0 cm |
| July | 27°C | 16°C | 21.3°C | 109 mm | 0 cm |
| August | 26°C | 15°C | 20.5°C | 94 mm | 0 cm |
| September | 23°C | 11°C | 16.9°C | 103 mm | 0 cm |
| October | 16°C | 5°C | 10.4°C | 96 mm | 1 cm |
| November | 9°C | −1°C | 4.2°C | 81 mm | 13 cm |
| December | 3°C | −5°C | −1.2°C | 86 mm | 35 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00333780; 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 Hiram?
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 (10).
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 USC00333780.
When is the last frost in Hiram?
In Hiram, the last spring frost (32°F) comes after May 1 in half of years and after May 18 in one year in ten; the first autumn frost comes before October 20 in half of years and before October 5 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
- May 11 year in 10 after May 18; 9 in 10 after April 18
- First autumn frost, half of years before
- October 201 year in 10 before October 5; 9 in 10 before November 1
NOAA puts the median frost-free season at 170 days, and the season without a hard freeze (28°F) at 192 days.
A hard freeze (28°F) comes after April 21 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hiram in zone 6a in ZIP code 44234, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hiram's NOAA station is in zone 6a: the coldest night of a typical year reaches −7°F (27 complete years).
Frost dates for every NOAA station in Ohio · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00333780; 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 Hiram?
In a normal year in Hiram, 4 days a year reach 90°F, 138 nights fall to 32°F or colder and 148 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 138a normal year
- Days that stay below freezing
- 48high of 32°F or less
- Days with 0.01 inch of precipitation
- 148a normal year
- Days with 1 inch of snow or more
- 24a normal year
The highest temperature in this station's record (since 1893) is 102°F, on August 6, 1918; the lowest is −25°F, on January 19, 1994.
The wettest calendar year on that record is 2011, with 66.15 in; the snowiest season is 1962–63, with 112.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00333780; records: ACIS (NOAA Regional Climate Centers), station USC00333780. Records use complete months only; a month missing more than three days is left out.
How sunny is Hiram?
Over a year 68% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hiram, 3.6 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (48%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 50% | 1.4 |
| February | 57% | 2.2 |
| March | 60% | 3.2 |
| April | 65% | 4.5 |
| May | 70% | 5.3 |
| June | 75% | 6.0 |
| July | 78% | 5.9 |
| August | 77% | 5.2 |
| September | 75% | 4.2 |
| October | 64% | 2.7 |
| November | 60% | 1.8 |
| December | 48% | 1.1 |
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 Hiram need?
A normal year in Hiram brings 6,635 heating degree days, 23% more than the median U.S. place (5,373), and 524 cooling degree days, 42% 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 2,603 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,265 | 0 |
| February | 1,093 | 0 |
| March | 947 | 0 |
| April | 548 | 3 |
| May | 253 | 32 |
| June | 64 | 106 |
| July | 14 | 181 |
| August | 23 | 143 |
| September | 131 | 53 |
| October | 447 | 6 |
| November | 762 | 0 |
| December | 1,088 | 0 |
| Year (annual) | 6,635 | 524 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00333780. 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 Hiram been warmer than normal lately?
2025 averaged 48.3°F, 0.2°F above the 1991-2020 normal of 48.1°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.8°F | +1.7°F | 46.33 | – |
| 2022 | 47.8°F | −0.3°F | 38.10 | – |
| 2023 | 50.0°F | +1.9°F | 45.39 | – |
| 2024 | 51.4°F | +3.3°F | 36.43 | – |
| 2025 | 48.3°F | +0.2°F | 50.71 | – |
Over 110 complete years from 1885 to 2025, the station's annual mean temperature rose at a fitted 1.2°F per century (+0.07°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00333780; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Hiram's climate compare?
Hiram is warmer than 1 of the other 98 places with their own NOAA record in Ohio, and wetter than 75. Across the 7,247 U.S. stations with normals, its annual mean of 48.1°F is warmer than 32%.
In the Köppen classification computed from these normals, Hiram is Dfb: continental, no dry season, warm 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 Hiram share this climate record?
5 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.
- Garrettsville, OH2,481 people · 4 mi W
- Windham, OH1,679 people · 5 mi S
- South Canal, OH920 people · 9 mi S
- West Farmington, OH534 people · 6 mi N
- Parkman, OH86 people · 5 mi NW
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 Hiram's climate
What is the coldest month in Hiram?
January, with a normal high of 33°F and a normal low of 16°F. The warmest is July (81°F by day, 60°F at night).
Does it snow in Hiram?
Yes: 63 inches in a normal year, falling on 32 days with 0.1 inch or more, the most in January (20.4 inches).
What is the rainiest month in Hiram?
July, with 4.31 in of precipitation in a normal year; the driest is February with 2.70 in.
What plant hardiness zone is Hiram in?
The USDA's 2023 map puts Hiram in zone 6a in ZIP code 44234, the nearest ZIP area. By the same method at Hiram's NOAA station, the coldest night of a typical year reaches −7°F (27 years, 1991-2020): zone 6a.
How late can frost come in Hiram?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 18. Waiting until May 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Ohio climateThe statewide normals and every place in the state
- Warren, OH13 miles from this station, 48.9°F a year
- Mosquito Creek Lake, OH13 miles from this station, 49.2°F a year
- Youngstown, OH18 miles from this station, 49.9°F a year
- Ravenna, OH19 miles from this station, 49.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made