Princeton climate

Princeton Weather in May

NOAA 1991-2020 normals for Smithfield, 17.5 km from Princeton

Average highs run from 78°F on May 1 to 84°F on May 31, and lows from 53°F to 62°F. Normal precipitation for the month is 4.20 in over about 10 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Princeton, in °F, with the record for each date.20406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
81°F
Average low
57°F
Precipitation
4.20 in
Record high
97°FMay 31, 2019
Record low
39°FMay 12, 2020
Chance of a freeze
0%
Days of 90°F or more
3.1
Daylight
13 h 38 min to 14 h 23 min
Cloud cover
56%
Humidity
76%
Dew point
60°F
Wind
8.9 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 178°F53°F86°F 202541°F 201831%0%
May 278°F53°F85°F 201245°F 201532%0%
May 378°F53°F91°F 202441°F 202632%0%
May 479°F54°F91°F 201242°F 202632%0%
May 579°F54°F88°F 202144°F 201132%0%
May 679°F54°F87°F 202444°F 201132%0%
May 779°F55°F86°F 202244°F 202032%0%
May 879°F55°F88°F 202444°F 202032%0%
May 980°F55°F88°F 201443°F 202032%0%
May 1080°F56°F88°F 201440°F 202032%0%
May 1180°F56°F87°F 201444°F 202032%0%
May 1280°F56°F88°F 201839°F 202032%0%
May 1380°F57°F90°F 201839°F 202032%0%
May 1481°F57°F90°F 201442°F 201332%0%
May 1581°F57°F89°F 201843°F 201332%0%
May 1681°F58°F91°F 202544°F 202133%0%
May 1781°F58°F91°F 202547°F 201633%0%
May 1881°F58°F89°F 201351°F 201433%0%
May 1982°F58°F93°F 201950°F 201433%0%
May 2082°F59°F90°F 201950°F 201433%0%
May 2182°F59°F93°F 202252°F 201433%0%
May 2282°F59°F90°F 202654°F 202133%0%
May 2382°F60°F88°F 201146°F 202533%0%
May 2483°F60°F91°F 202450°F 202533%0%
May 2583°F60°F93°F 201946°F 201333%0%
May 2683°F60°F94°F 201947°F 201333%0%
May 2783°F61°F93°F 201949°F 201333%0%
May 2884°F61°F92°F 202450°F 201333%0%
May 2984°F61°F96°F 201950°F 201333%0%
May 3084°F62°F96°F 201954°F 202133%0%
May 3184°F62°F97°F 201954°F 202133%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Princeton, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 6:21 AM, sunset 7:59 PM
May 31
sunrise 5:59 AM, sunset 8:22 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00317994 (Smithfield), public domain. Records: NOAA GHCN-Daily, station USC00313503, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.