Photo: Generic1139 · CC BY 3.0For weather, McDonald is about as ordinary as U.S. towns get
Sunny July days climb to about 83°. Seasons differ by 62°, from the coldest nights to the warmest afternoons. In July, afternoons here are cooler than in 70% of U.S. towns. The heating season runs November to March: each of those months averages under 50°.
A year in McDonald at a glance
Each month’s typical high and low, and what it brings.
What stands out about McDonald’s climate
Compared with towns across the U.S., with McDonald’s place in Pennsylvania beside it.
What a year in McDonald feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 181 frost-free days a year
In half of years the last 32° night comes by April 23 and the first by October 23. Frost and day counts come from NOAA’s station at Pittsburgh International Airport, 8 miles from the town’s center, 170 ft higher.
The 2023 USDA map puts McDonald’s center in zone 6b: 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 44 inches of snow a winter
Snow, measured at Pittsburgh International Airport, falls mostly in January. Precipitation (rain plus melted snow) adds up to 41 inches a year; July is the wettest month and February the driest. Rain or snow falls on about 154 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in McDonald
87% 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 Pittsburgh International Airport.
Living with McDonald’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
181 frost-free days in zone 6b. The last frost comes by Apr 23 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 23.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August, September and October. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in McDonald from natural hazards, river flooding is the largest share (91%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →McDonald and its neighbors
Every town next door is within a degree of McDonald in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like McDonald’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 |
|---|---|---|---|---|
| McDonald, PA | 21° | 83° | 41" | 44" |
| East Chicago, IN | 19° | 83° | 38" | 39" |
| Walden, NY | 18° | 84° | 44" | 44" |
| Three Rivers, MI | 17° | 83° | 38" | 41" |
| Chicago, IL | 18° | 84° | 38" | 39" |
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 McDonald averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.4°).
A smaller shift than in 60% 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 McDonald compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with McDonald’s place among Pennsylvania’s.
McDonald weather by month
Highs, lows and precipitation from NOAA’s grid at McDonald’s center; snow, wet days and snow on the ground from Pittsburgh International Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 37° | 21° | 3.1" | 13.3" | 17 | 14 | 20° – 38° |
| February | 40° | 23° | 2.6" | 11.7" | 14 | 11 | 18° – 40° |
| March | 50° | 30° | 3.3" | 7.6" | 14 | 5 | 34° – 51° |
| April | 63° | 39° | 3.5" | 1.0" | 14 | 0 | 45° – 56° |
| May | 72° | 49° | 4.1" | 0.0" | 14 | 0 | 54° – 67° |
| June | 80° | 58° | 4.1" | 0.0" | 12 | 0 | 65° – 71° |
| July | 83° | 62° | 4.2" | 0.0" | 11 | 0 | 68° – 76° |
| August | 82° | 60° | 3.7" | 0.0" | 11 | 0 | 67° – 76° |
| September | 76° | 54° | 3.5" | 0.0" | 10 | 0 | 61° – 69° |
| October | 64° | 43° | 3.1" | 0.4" | 11 | 0 | 49° – 59° |
| November | 52° | 33° | 2.9" | 2.4" | 12 | 1 | 36° – 48° |
| December | 41° | 26° | 3.1" | 7.7" | 15 | 8 | 23° – 45° |
| Year | 61° | 41° | 41.3" | 44.1" | 154 | 40 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 18° to 40°. June is the most reliable, staying within 7°.
Where McDonald’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 McDonald’s center.
- Snow: Pittsburgh International Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Pittsburgh International Airport, 8 miles from the town’s center, 170 ft higher; 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 McDonald’s climate
What is the weather like in McDonald?
A typical July afternoon reaches 83°, a January night drops to 21°, and about 44 inches of snow falls in a normal winter. Colder January nights than 55% of U.S. towns; cooler July afternoons than 70% of U.S. towns.
How cold does it get in McDonald in winter?
January nights average 21°. About 114 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 20°.
How much snow does McDonald get?
About 44 inches in a normal winter at Pittsburgh International Airport, most of it in January, with snow on the ground about 40 days a year.
How hot does it get in McDonald?
July, with a typical high of 83° and a low of 62°. About 10 days a year reach 90° (Pittsburgh International Airport).
When is the first and last frost in McDonald?
In half of years the last spring frost (32°) comes by April 23 and the first fall frost by October 23, about 181 frost-free days, at Pittsburgh International Airport.
What growing zone is McDonald in?
Zone 6b 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 McDonald?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is McDonald getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 60% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in McDonald.
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.