Wet weather: 48 inches of rain and melted snow a year in Merion Station, more than in 75% of U.S. towns
Deep winter brings January lows near 24°. Only 63° separates winter nights from summer afternoons. Summer afternoons here are warmer than in 61% of U.S. towns. Picnics, hikes and garden evenings come into their own from April to June and September to October, with highs of 64–82°.
A year in Merion Station at a glance
Each month’s typical high and low, and what it brings.
What stands out about Merion Station’s climate
Compared with towns across the U.S., with Merion Station’s place in Pennsylvania beside it.
What a year in Merion Station feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 199 frost-free days a year
In half of years the last 32° night comes by April 15 and the first by October 31. Day counts come from NOAA’s station at Phila Franklin Inst, PA, 5 miles from the town’s center, 210 ft lower; frost dates and degree days from Pennsauken 1n, NJ, 12 miles away.
The 2023 USDA map puts Merion Station’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 48 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 Merion Station
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 Pennsauken 1n, NJ.
Living with Merion Station’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
199 frost-free days in zone 7b. The last frost comes by Apr 15 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. 0.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Merion Station from natural hazards, river flooding is the largest share (77%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Merion Station and its neighbors
Every town next door is within a degree of Merion Station in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Merion Station’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 |
|---|---|---|---|---|
| Merion Station, PA | 24° | 87° | 48" | 7.6" |
| Morehead, KY | 24° | 87° | 50" | 6.5" |
| Washington, IN | 22° | 87° | 48" | 9.2" |
| Huntington, WV | 25° | 87° | 46" | 10" |
| 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 Merion Station averaged 2.1° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 92% 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 Merion Station compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Merion Station’s place among Pennsylvania’s.
Merion Station weather by month
Highs, lows and precipitation from NOAA’s grid at Merion Station’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 | 40° | 24° | 3.4" | 2.7" | 9 | 3 | 24° – 40° |
| February | 43° | 26° | 2.8" | 2.4" | 9 | 3 | 23° – 42° |
| March | 51° | 33° | 4.1" | 0.6" | 10 | 2 | 37° – 50° |
| April | 64° | 42° | 3.7" | 0.1" | 11 | 0 | 49° – 58° |
| May | 73° | 52° | 3.9" | 0.0" | 11 | 0 | 58° – 68° |
| June | 82° | 62° | 4.4" | 0.0" | 9 | 0 | 69° – 76° |
| July | 87° | 67° | 4.8" | 0.0" | 9 | 0 | 72° – 81° |
| August | 85° | 65° | 4.5" | 0.0" | 9 | 0 | 70° – 79° |
| September | 78° | 58° | 4.7" | 0.0" | 8 | 0 | 64° – 72° |
| October | 66° | 47° | 4.0" | 0.0" | 9 | 0 | 52° – 63° |
| November | 55° | 37° | 3.3" | 0.2" | 8 | 0 | 40° – 51° |
| December | 45° | 29° | 4.3" | 1.6" | 10 | 1 | 29° – 49° |
| Year | 64° | 45° | 47.9" | 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 29° to 49°. June is the most reliable, staying within 7°.
Where Merion Station’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 Merion Station’s center.
- Snow: Conshohocken, PA.
- Frost dates, heating and cooling: Pennsauken 1n, NJ, 12 miles away.
- Freezing nights, 90° and 100° days: Phila Franklin Inst, PA, 5 miles from the town’s center, 210 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 Merion Station’s climate
What is the weather like in Merion Station?
A typical July afternoon reaches 87°, a January night drops to 24°, and about 8 inches of snow falls in a normal winter. Milder January nights than 61% of U.S. towns; hotter July afternoons than 61% of U.S. towns.
How cold does it get in Merion Station in winter?
January nights average 24°. About 62 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 24°.
How much snow does Merion Station 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 Merion Station?
July, with a typical high of 87° and a low of 67°. About 40 days a year reach 90° and 2 reach 100° (Pennsauken 1n, NJ).
When is the first and last frost in Merion Station?
In half of years the last spring frost (32°) comes by April 15 and the first fall frost by October 31, about 199 frost-free days, at Pennsauken 1n, NJ.
What growing zone is Merion Station 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 Merion Station?
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 Merion Station getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Merion Station.
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.