Weather without surprises: Wynnewood keeps close to the norm for U.S. towns
The coldest hours of a January night bottom out at 25° on average. The wettest month is July; the driest is February. By precipitation alone, it ranks wetter than 71% of U.S. towns. Keep the boiler serviced for the months from November to March, which average under 50°.
A year in Wynnewood at a glance
Each month’s typical high and low, and what it brings.
What stands out about Wynnewood’s climate
Compared with towns across the U.S., with Wynnewood’s place in Pennsylvania beside it.
What a year in Wynnewood feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 224 frost-free days a year
In half of years the last 32° night comes by April 2 and the first by November 10. Day counts come from NOAA’s station at Phila Franklin Inst, PA, 6 miles from the town’s center, 220 ft lower; frost dates and degree days from Philadelphia International Airport, 9 miles away.
The 2023 USDA map puts Wynnewood’s center in zone 7b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 7°. 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 8 inches of snow a winter
Snow, measured at Conshohocken, PA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 47 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 111 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Wynnewood
77% 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 Philadelphia International Airport.
Living with Wynnewood’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
224 frost-free days in zone 7b. The last frost comes by Apr 2 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 10.
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 Wynnewood from natural hazards, river flooding is the largest share (52%); heat waves, cold waves, winter storms and ice storms together are 25%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Wynnewood and its neighbors
Every town next door is within a degree of Wynnewood in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Wynnewood’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 |
|---|---|---|---|---|
| Wynnewood, PA | 25° | 87° | 47" | 7.6" |
| Mount Vernon, IN | 25° | 88° | 47" | 8.4" |
| Huntington, WV | 25° | 87° | 46" | 10" |
| Benton, IL | 24° | 88° | 47" | 9.8" |
| Elizabethton, TN | 26° | 86° | 47" | 6.0" |
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 Wynnewood averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.6°).
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 Wynnewood compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Wynnewood’s place among Pennsylvania’s.
Wynnewood weather by month
Highs, lows and precipitation from NOAA’s grid at Wynnewood’s center; snow, wet days and snow on the ground from Conshohocken, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 41° | 25° | 3.3" | 2.7" | 9 | 3 | 25° – 40° |
| February | 44° | 26° | 2.8" | 2.4" | 9 | 3 | 24° – 42° |
| March | 52° | 33° | 4.1" | 0.6" | 10 | 2 | 37° – 51° |
| April | 64° | 43° | 3.7" | 0.1" | 11 | 0 | 50° – 58° |
| May | 74° | 53° | 3.7" | 0.0" | 11 | 0 | 58° – 69° |
| June | 82° | 62° | 4.3" | 0.0" | 9 | 0 | 69° – 77° |
| July | 87° | 68° | 4.7" | 0.0" | 9 | 0 | 72° – 81° |
| August | 85° | 66° | 4.5" | 0.0" | 9 | 0 | 71° – 79° |
| September | 78° | 59° | 4.6" | 0.0" | 8 | 0 | 65° – 73° |
| October | 67° | 47° | 3.9" | 0.0" | 9 | 0 | 52° – 63° |
| November | 55° | 37° | 3.3" | 0.2" | 8 | 0 | 40° – 51° |
| December | 46° | 30° | 4.2" | 1.6" | 10 | 1 | 30° – 50° |
| Year | 64° | 46° | 47.1" | 7.6" | 111 | 9 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 30° to 50°. June is the most reliable, staying within 8°.
Where Wynnewood’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 Wynnewood’s center.
- Snow: Conshohocken, PA.
- Frost dates, heating and cooling: Philadelphia International Airport, 9 miles away.
- Freezing nights, 90° and 100° days: Phila Franklin Inst, PA, 6 miles from the town’s center, 220 ft lower; 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 Wynnewood’s climate
What is the weather like in Wynnewood?
A typical July afternoon reaches 87°, a January night drops to 25°, and about 8 inches of snow falls in a normal winter. Milder January nights than 63% of U.S. towns; hotter July afternoons than 63% of U.S. towns.
How cold does it get in Wynnewood in winter?
January nights average 25°. About 62 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 25°.
How much snow does Wynnewood get?
About 7.6 inches in a normal winter at Conshohocken, PA, most of it in January, with snow on the ground about 9 days a year.
How hot does it get in Wynnewood?
July, with a typical high of 87° and a low of 68°. About 40 days a year reach 90° and 2 reach 100° (Philadelphia International Airport).
When is the first and last frost in Wynnewood?
In half of years the last spring frost (32°) comes by April 2 and the first fall frost by November 10, about 224 frost-free days, at Philadelphia International Airport.
What growing zone is Wynnewood in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 7°.
What is the best time of year to visit Wynnewood?
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 Wynnewood 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 Wynnewood.
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.