Weather without surprises: Chilo keeps close to the norm for U.S. towns
High summer brings afternoon highs near 86°. By precipitation alone, it ranks wetter than 64% of U.S. towns. Decade by decade the climate has edged up, 1.2° above 1901–2000. Seedlings are safe outdoors from about April 16, with the first autumn frost due around October 31.
A year in Chilo at a glance
Each month’s typical high and low, and what it brings.
What stands out about Chilo’s climate
Compared with towns across the U.S., with Chilo’s place in Ohio beside it.
What a year in Chilo feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 196 frost-free days a year
In half of years the last 32° night comes by April 16 and the first by October 31. Frost and day counts come from NOAA’s station at Chilo Meldahl Locks & Dam, OH, 1.9 miles from the town’s center, at about the same height.
The 2023 USDA map puts Chilo’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 0°. 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 17 inches of snow a winter
Snow, measured at Ripley Exp Farm, OH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 46 inches a year; May is the wettest month and November the driest. Rain or snow falls on about 131 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Chilo
81% of the work is heating. Months averaging under 55° run from November 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 Chilo Meldahl Locks & Dam, OH.
Living with Chilo’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
196 frost-free days in zone 6b. The last frost comes by Apr 16 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 31.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Chilo from natural hazards, river flooding is the largest share (66%); heat waves, cold waves, winter storms and ice storms together are 15%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Chilo and its neighbors
Every town next door is within a degree of Chilo in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Chilo’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 |
|---|---|---|---|---|
| Chilo, OH | 24° | 86° | 46" | 17" |
| Olney, MD | 25° | 86° | 46" | 16" |
| Mays Landing, NJ | 25° | 86° | 47" | 17" |
| Uniondale, NY | 25° | 85° | 46" | 19" |
| Newark, DE | 24° | 87° | 47" | 20" |
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 Chilo averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.6°).
A smaller shift than in 61% 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 Chilo compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Chilo’s place among Ohio’s.
Chilo weather by month
Highs, lows and precipitation from NOAA’s grid at Chilo’s center; snow, wet days and snow on the ground from Ripley Exp Farm, OH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 40° | 24° | 3.3" | 6.5" | 12 | 23° – 41° |
| February | 45° | 26° | 3.3" | 5.2" | 10 | 23° – 44° |
| March | 54° | 33° | 4.3" | 2.7" | 12 | 37° – 56° |
| April | 66° | 42° | 4.4" | 0.0" | 14 | 48° – 60° |
| May | 75° | 52° | 5.0" | 0.0" | 13 | 57° – 70° |
| June | 83° | 60° | 4.6" | 0.0" | 12 | 68° – 75° |
| July | 86° | 64° | 4.8" | 0.0" | 10 | 70° – 80° |
| August | 85° | 63° | 3.6" | 0.0" | 9 | 70° – 79° |
| September | 80° | 56° | 3.1" | 0.0" | 8 | 64° – 74° |
| October | 68° | 45° | 3.0" | 0.1" | 9 | 53° – 62° |
| November | 55° | 35° | 2.9" | 0.6" | 11 | 38° – 50° |
| December | 45° | 28° | 3.6" | 2.1" | 12 | 24° – 47° |
| Year | 65° | 44° | 45.8" | 17.2" | 131 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 24° to 47°. June is the most reliable, staying within 8°.
Where Chilo’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 Chilo’s center.
- Snow: Ripley Exp Farm, OH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Chilo Meldahl Locks & Dam, OH, 1.9 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 Chilo’s climate
What is the weather like in Chilo?
A typical July afternoon reaches 86°, a January night drops to 24°, and about 17 inches of snow falls in a normal winter. Milder January nights than 59% of U.S. towns; hotter July afternoons than 57% of U.S. towns.
How cold does it get in Chilo in winter?
January nights average 24°. About 104 nights a year reach 32° or below and 1 reach 0° or below. In the coldest January of the last 30 years the month averaged 23°.
How much snow does Chilo get?
About 17 inches in a normal winter at Ripley Exp Farm, OH, most of it in January.
How hot does it get in Chilo?
July, with a typical high of 86° and a low of 64°. About 24 days a year reach 90° (Chilo Meldahl Locks & Dam, OH).
When is the first and last frost in Chilo?
In half of years the last spring frost (32°) comes by April 16 and the first fall frost by October 31, about 196 frost-free days, at Chilo Meldahl Locks & Dam, OH.
What growing zone is Chilo in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 0°.
What is the best time of year to visit Chilo?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Chilo getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 61% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Chilo.
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.