Big Island, OH climate
Big Island has chilly winters and warm summers. A typical July afternoon reaches 84°, a January night drops to 19°, and about 24 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade14° warmer than normal today. The forecast high is 84°, and a typical Oct 1 in Big Island peaks around 70°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Big Island feels like
Winter
Spring
Summer
Fall
Big Island weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 34° | 19° | 2.4" | 7.6" | 11 | 18° – 38° |
| February | 38° | 22° | 2.1" | 6.6" | 9 | 16° – 41° |
| March | 48° | 30° | 2.8" | 4.1" | 11 | 32° – 51° |
| April | 62° | 40° | 3.6" | 0.4" | 13 | 44° – 57° |
| May | 73° | 50° | 3.9" | 0 | 13 | 55° – 68° |
| June | 81° | 60° | 4.2" | 0 | 12 | 65° – 73° |
| July | 84° | 63° | 3.9" | 0 | 11 | 68° – 78° |
| August | 83° | 61° | 3.4" | 0 | 10 | 67° – 77° |
| September | 77° | 54° | 3.1" | 0 | 10 | 62° – 71° |
| October | 64° | 43° | 2.8" | 0 | 10 | 50° – 60° |
| November | 51° | 33° | 2.8" | 0.6" | 10 | 35° – 48° |
| December | 39° | 25° | 2.5" | 4.5" | 11 | 20° – 43° |
| Year | 61° | 42° | 37.4" | 23.8" | 131 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Big Island
Big Island gets 37 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 131 days a year.
About 178 frost-free days a year
In half of years the last 32° night comes by April 25 and the first one by October 20. That leaves about 178 frost-free days for gardens, longer than 50% of U.S. towns.
Heating and cooling a home in Big Island
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Big Island, 88% of that work is heating and 12% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Big Island and its neighbors
Big Island borders 6 towns with climate data. January nights across them vary by 0.4°. Marion has the coldest January nights (19°) and Green Camp the hottest July afternoons (84°). Big Island’s January low is 19° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Big Island compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Big Island averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is larger than in 50% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Big Island’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 16° to 41°. June is the most reliable, staying within 8°.
Common questions about Big Island’s climate
What is the coldest month in Big Island?
January, with a typical high of 34° and a low of 19°.
What is the hottest month in Big Island?
July, with a typical high of 84° and a low of 63°. About 13 days a year reach 90°.
How much snow does Big Island get?
About 24 inches in a normal winter, most of it in January.
When is the first frost in Big Island?
In half of years the first 32° night comes by October 20, and the last spring frost by April 25.
What is the rainiest month in Big Island?
June, with 4.2 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Big Island itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Marion 2 N, OH (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.