Princeton, New Jersey Climate
United States
Pop. 29,603 Elev. 72 m / 236 ft
TZ: America/New_York (UTC-4) ·
Summers in Princeton are warm, with July highs around 88°F (31°C), while winters are cold with January lows of 26°F (-3°C). Humidity pushes the summer feels-like temperature to 101°F (38°C), while wind chill can drive winter lows to 18°F (-8°C). Expect around 60 rainy days annually (37.2 in / 944 mm total), with snow on 3 days and 22 in (548 mm) of annual accumulation. The city averages 130 sunny days per year and around 28 thunderstorm days. Ocean water temperatures reach 78°F (25°C) in summer.
| Temperature | 88°F (31°C) high | 26°F (-4°C) low |
| Feels like | 101°F (38°C) high | 18°F (-8°C) low |
| Rain | 60 days | 37.2 in (944 mm) /yr |
| Snow | 3 days | 21.6 in (548 mm) /yr |
| Sky | 130 sunny | 28 stormy |
| Wind | 3.0 mph (1.4 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jun, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
39
Jan 62
Feb 49
Mar 68
Apr 74
May 67
Jun 59
Jul 45
Aug 57
Sep 42
Oct 53
Nov 57
Dec Humidity (%)
51
Jan 54
Feb 50
Mar 53
Apr 67
May 66
Jun 70
Jul 62
Aug 68
Sep 60
Oct 57
Nov 59
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 10 mi Trenton Mercer Airport (TTN)
Ski resort 44 mi Big Snow American Dream
National park 154 mi Harriet Tubman Underground Railroad National Monument
Mountain peak
(4,971 ft) 263 mi Schofield Cobble
Hospital 2 mi University Medical Center of Princeton at Plainsboro
Hiking trail 6 mi White Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 37°F 3°C | 26°F -4°C | 0.8 in 19 mm | 5.9 in151 mm | 18 |
| February | 43°F 6°C | 30°F -1°C | 2.4 in 61 mm | 6.7 in171 mm | 6 |
| March | 59°F 15°C | 39°F 4°C | 3.6 in 92 mm | 0.0 in0 mm | 13 |
| April | 66°F 19°C | 47°F 9°C | 4.1 in 103 mm | 0.5 in12 mm | 5 |
| May | 72°F 22°C | 56°F 13°C | 6.0 in 153 mm | — | 6 |
| June | 83°F 28°C | 66°F 19°C | 2.7 in 68 mm | — | 8 |
| July | 88°F 31°C | 72°F 22°C | 6.4 in 163 mm | — | 8 |
| August | 82°F 28°C | 63°F 17°C | 1.4 in 35 mm | — | 15 |
| September | 79°F 26°C | 61°F 16°C | 3.3 in 84 mm | — | 11 |
| October | 67°F 20°C | 50°F 10°C | 2.6 in 65 mm | — | 17 |
| November | 55°F 13°C | 40°F 4°C | 2.0 in 52 mm | 0.0 in1 mm | 14 |
| December | 40°F 5°C | 27°F -3°C | 1.9 in 49 mm | 8.4 in214 mm | 9 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 18 | 1 |
| February | 6 | 1 |
| March | 13 | 1 |
| April | 5 | 2 |
| May | 6 | 6 |
| June | 8 | 2 |
| July | 8 | 9 |
| August | 15 | 1 |
| September | 11 | 4 |
| October | 17 | 1 |
| November | 14 | 0 |
| December | 9 | 0 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 49°F 9°C | 33°F 0°C |
| February | 42°F 6°C | 32°F 0°C |
| March | 44°F 7°C | 42°F 6°C |
| April | 51°F 11°C | 51°F 11°C |
| May | 59°F 15°C | 62°F 17°C |
| June | 73°F 23°C | 71°F 22°C |
| July | 78°F 25°C | 79°F 26°C |
| August | 76°F 25°C | 73°F 23°C |
| September | 71°F 22°C | 69°F 20°C |
| October | 70°F 21°C | 58°F 15°C |
| November | 61°F 16°C | 46°F 8°C |
| December | 52°F 11°C | 34°F 1°C |