Photo: Shuvaev · CC BY-SA 4.0More precipitation falls on Deer Lake than on 85% of U.S. towns: 50 inches a year
In January the night’s low is typically 20°. The seasons are far apart: from a winter night to a summer afternoon the average spans 65°. Long walks are most pleasant from May to June and August to October, when afternoons reach 64–83°.
A year in Deer Lake at a glance
Each month’s typical high and low, and what it brings.
What stands out about Deer Lake’s climate
Compared with towns across the U.S., with Deer Lake’s place in Pennsylvania beside it.
What a year in Deer Lake feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 189 frost-free days a year
In half of years the last 32° night comes by April 16 and the first by October 25. Frost and day counts come from NOAA’s station at Hamburg, PA, 6 miles from the town’s center, 120 ft lower.
The 2023 USDA map puts Deer Lake’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 21 inches of snow a winter
Snow, measured at Hamburg, PA, falls mostly in February. 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 133 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Deer Lake
86% 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 Hamburg, PA.
Living with Deer Lake’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
189 frost-free days in zone 7a. 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 25.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Deer Lake from natural hazards, river flooding is the largest share (73%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Deer Lake and similar climates
TownRatings has no climate map of the towns around Deer Lake yet.
Climates most like Deer Lake’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 |
|---|---|---|---|---|
| Deer Lake, PA | 20° | 85° | 50" | 21" |
| Bloomington, IN | 21° | 85° | 47" | 18" |
| Taunton, MA | 20° | 84° | 50" | 26" |
| Clarksburg, WV | 23° | 85° | 47" | 24" |
| Elsmere, KY | 23° | 85° | 47" | 23" |
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 Deer Lake averaged 1.4° warmer than the 1900s. The biggest change is in December (+3.1°).
A bigger shift than in 53% 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 Deer Lake compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Deer Lake’s place among Pennsylvania’s.
Deer Lake weather by month
Highs, lows and precipitation from NOAA’s grid at Deer Lake’s center; snow, wet days and snow on the ground from Hamburg, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 37° | 20° | 3.6" | 5.1" | 11 | 10 | 19° – 37° |
| February | 40° | 22° | 2.8" | 7.1" | 9 | 11 | 19° – 38° |
| March | 49° | 29° | 4.0" | 4.6" | 10 | 4 | 31° – 47° |
| April | 62° | 38° | 4.0" | 0.3" | 12 | 0 | 45° – 55° |
| May | 72° | 48° | 4.2" | 0.0" | 14 | 0 | 55° – 66° |
| June | 80° | 58° | 4.7" | 0.0" | 12 | 0 | 66° – 72° |
| July | 85° | 63° | 5.0" | 0.0" | 11 | 0 | 69° – 78° |
| August | 83° | 61° | 4.8" | 0.0" | 11 | 0 | 67° – 75° |
| September | 76° | 53° | 5.1" | 0.0" | 10 | 0 | 61° – 69° |
| October | 64° | 42° | 4.6" | 0.0" | 11 | 0 | 47° – 60° |
| November | 52° | 33° | 3.5" | 0.5" | 9 | 0 | 37° – 47° |
| December | 42° | 26° | 4.1" | 3.7" | 11 | 4 | 26° – 44° |
| Year | 62° | 41° | 50.4" | 21.3" | 133 | 29 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 19° to 38°. June is the most reliable, staying within 6°.
Where Deer Lake’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 Deer Lake’s center.
- Snow: Hamburg, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Hamburg, PA, 6 miles from the town’s center, 120 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 Deer Lake’s climate
What is the weather like in Deer Lake?
A typical July afternoon reaches 85°, a January night drops to 20°, and about 21 inches of snow falls in a normal winter. Colder January nights than 58% of U.S. towns; cooler July afternoons than 51% of U.S. towns.
How cold does it get in Deer Lake in winter?
January nights average 20°. About 121 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 19°.
How much snow does Deer Lake get?
About 21 inches in a normal winter at Hamburg, PA, most of it in February, with snow on the ground about 29 days a year.
How hot does it get in Deer Lake?
July, with a typical high of 85° and a low of 63°. About 17 days a year reach 90° (Hamburg, PA).
When is the first and last frost in Deer Lake?
In half of years the last spring frost (32°) comes by April 16 and the first fall frost by October 25, about 189 frost-free days, at Hamburg, PA.
What growing zone is Deer Lake 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 Deer Lake?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Deer Lake getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 53% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Deer Lake.
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.