Photo: Adam Moss aka Roadgeek Adam on Flickr · CC BY-SA 2.0Hatfield gets more rain and snow than 78% of U.S. towns: 48 inches of precipitation a year
The coldest hours of a January night bottom out at 22° on average. Temperatures cover 65° across the year, low to high. Garden planting can start around April 26; autumn frost returns near October 17.
A year in Hatfield at a glance
Each month’s typical high and low, and what it brings.
What stands out about Hatfield’s climate
Compared with towns across the U.S., with Hatfield’s place in Pennsylvania beside it.
What a year in Hatfield feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 175 frost-free days a year
In half of years the last 32° night comes by April 26 and the first by October 17. Frost and day counts come from NOAA’s station at Sellersville, PA, 5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Hatfield’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 2°. 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 13 inches of snow a winter
Snow, measured at Graterford 1 E, PA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 48 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 104 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Hatfield
88% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October 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 Sellersville, PA.
Living with Hatfield’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
175 frost-free days in zone 7a. The last frost comes by Apr 26 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 17.
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 Hatfield from natural hazards, river flooding is the largest share (74%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Hatfield and similar climates
TownRatings has no climate map of the towns around Hatfield yet.
Climates most like Hatfield’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 |
|---|---|---|---|---|
| Hatfield, PA | 22° | 87° | 48" | 13" |
| Scottsburg, IN | 23° | 87° | 48" | 12" |
| Paris, KY | 24° | 87° | 49" | 15" |
| Robinson, IL | 22° | 87° | 45" | 12" |
| Withamsville, OH | 23° | 86° | 46" | 16" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Hatfield averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.7°).
A bigger shift than in 91% 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 Hatfield compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Hatfield’s place among Pennsylvania’s.
Hatfield weather by month
Highs, lows and precipitation from NOAA’s grid at Hatfield’s center; snow, wet days and snow on the ground from Graterford 1 E, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 39° | 22° | 3.4" | 3.9" | 8 | 22° – 38° |
| February | 42° | 24° | 2.8" | 5.4" | 6 | 22° – 40° |
| March | 51° | 31° | 4.1" | 1.3" | 9 | 35° – 50° |
| April | 63° | 40° | 3.8" | 0.1" | 10 | 47° – 57° |
| May | 73° | 50° | 4.0" | 0.0" | 10 | 57° – 67° |
| June | 82° | 60° | 4.3" | 0.0" | 9 | 68° – 74° |
| July | 87° | 65° | 4.9" | 0.0" | 10 | 71° – 79° |
| August | 85° | 63° | 4.6" | 0.0" | 9 | 70° – 77° |
| September | 78° | 56° | 4.6" | 0.0" | 8 | 64° – 70° |
| October | 66° | 44° | 4.2" | 0.0" | 9 | 50° – 62° |
| November | 54° | 35° | 3.3" | 0.0" | 8 | 38° – 49° |
| December | 44° | 27° | 4.3" | 2.2" | 9 | 29° – 47° |
| Year | 64° | 43° | 48.4" | 12.9" | 104 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 29° to 47°. September is the most reliable, staying within 7°.
Where Hatfield’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 Hatfield’s center.
- Snow: Graterford 1 E, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Sellersville, PA, 5 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 Hatfield’s climate
What is the weather like in Hatfield?
A typical July afternoon reaches 87°, a January night drops to 22°, and about 13 inches of snow falls in a normal winter. Milder January nights than 51% of U.S. towns; hotter July afternoons than 60% of U.S. towns.
How cold does it get in Hatfield in winter?
January nights average 22°. About 131 nights a year reach 32° or below and 2 reach 0° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Hatfield get?
About 13 inches in a normal winter at Graterford 1 E, PA, most of it in February.
How hot does it get in Hatfield?
July, with a typical high of 87° and a low of 65°. About 15 days a year reach 90° (Sellersville, PA).
When is the first and last frost in Hatfield?
In half of years the last spring frost (32°) comes by April 26 and the first fall frost by October 17, about 175 frost-free days, at Sellersville, PA.
What growing zone is Hatfield in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 2°.
What is the best time of year to visit Hatfield?
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 Hatfield getting warmer?
Yes: 1991–2020 averaged 2.0° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 91% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Hatfield.
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.