Photo: JERRYE & ROY KLOTZ MD · CC BY-SA 3.0Foster Township’s winters are colder and snowier than most of the U.S.
A typical July afternoon reaches 78°, a January night drops to 16°, and about 48 inches of snow falls in a normal winter.
A year in Foster Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Foster Township’s climate
Compared with towns across the U.S., with Foster Township’s place in Pennsylvania beside it.
What a year in Foster Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 153 frost-free days a year
In half of years the last 32° night comes by May 7 and the first by October 6. Frost and day counts come from NOAA’s station at Francis E Walter Dam, PA, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Foster Township’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −6°. 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 48 inches of snow a winter
Snow, measured at Mahanoy City 2 N, PA, is heaviest from January through February, about 13 inches a month. Precipitation (rain plus melted snow) adds up to 50 inches a year; September is the wettest month and February the driest. Rain or snow falls on about 140 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Foster Township
95% 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 Francis E Walter Dam, PA.
Living with Foster Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
153 frost-free days in zone 6a. The last frost comes by May 7 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 6.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 27 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Foster Township from natural hazards, river flooding is the largest share (58%); heat waves, cold waves, winter storms and ice storms together are 22%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Foster Township and its neighbors
Butler Township the hottest July afternoons (82°, 3° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Foster Township’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 |
|---|---|---|---|---|
| Foster Township, PA | 16° | 78° | 50" | 48" |
| Biddeford, ME | 16° | 79° | 49" | 49" |
| Templeton, MA | 14° | 80° | 49" | 51" |
| Portsmouth, NH | 16° | 80° | 48" | 56" |
| Woodstock, CT | 17° | 81° | 50" | 52" |
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 Foster Township averaged 1.6° warmer than the 1900s. The biggest change is in December (+3.4°).
A bigger shift than in 66% 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 Foster Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Foster Township’s place among Pennsylvania’s.
Foster Township weather by month
Highs, lows and precipitation from NOAA’s grid at Foster Township’s center; snow, wet days and snow on the ground from Mahanoy City 2 N, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 16° | 3.6" | 12.3" | 13 | 18 | 14° – 32° |
| February | 34° | 17° | 2.7" | 12.7" | 11 | 16 | 13° – 33° |
| March | 43° | 24° | 3.7" | 9.2" | 11 | 10 | 26° – 44° |
| April | 56° | 34° | 4.2" | 2.1" | 12 | 1 | 40° – 50° |
| May | 66° | 45° | 4.2" | 0.0" | 14 | 0 | 51° – 62° |
| June | 74° | 54° | 4.9" | 0.0" | 13 | 0 | 60° – 67° |
| July | 78° | 58° | 4.8" | 0.0" | 11 | 0 | 64° – 72° |
| August | 76° | 57° | 4.6" | 0.0" | 11 | 0 | 63° – 70° |
| September | 69° | 51° | 5.1" | 0.0" | 10 | 0 | 57° – 64° |
| October | 58° | 39° | 4.7" | 0.5" | 12 | 0 | 44° – 57° |
| November | 46° | 30° | 3.7" | 2.2" | 10 | 2 | 33° – 43° |
| December | 36° | 21° | 4.0" | 9.0" | 12 | 11 | 20° – 40° |
| Year | 56° | 37° | 50.2" | 48.0" | 140 | 59 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 20° to 40°. September is the most reliable, staying within 7°.
Where Foster Township’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 Foster Township’s center.
- Snow: Mahanoy City 2 N, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Francis E Walter Dam, PA, 10 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 Foster Township’s climate
What is the weather like in Foster Township?
A typical July afternoon reaches 78°, a January night drops to 16°, and about 48 inches of snow falls in a normal winter. Colder January nights than 83% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Foster Township in winter?
January nights average 16°. About 163 nights a year reach 32° or below and 9 reach 0° or below. In the coldest January of the last 30 years the month averaged 14°.
How much snow does Foster Township get?
About 48 inches in a normal winter at Mahanoy City 2 N, PA, heaviest from January through February, about 13 inches a month, with snow on the ground about 59 days a year.
How hot does it get in Foster Township?
July, with a typical high of 78° and a low of 58°. About 4 days a year reach 90° (Francis E Walter Dam, PA).
When is the first and last frost in Foster Township?
In half of years the last spring frost (32°) comes by May 7 and the first fall frost by October 6, about 153 frost-free days, at Francis E Walter Dam, PA.
What growing zone is Foster Township in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −6°.
What is the best time of year to visit Foster Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Foster Township getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 66% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Foster Township.
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.