Ames climate

Ames Weather in December

NOAA 1991-2020 normals for Ames Muni AP, 4.8 km from Ames

Average highs run from 40°F on December 1 to 30°F on December 31, and lows from 21°F to 13°F. Normal precipitation for the month is 1.05 in over about 6 wet days.

December day by day

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

Normal daily high and low temperature at Ames, in °F, with the record for each date.-40-20020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
34°F
Average low
17°F
Precipitation
1.05 in
Snowfall
6.5 in
Record high
73°FDec 15, 2021
Record low
-24°FDec 23, 1989
Chance of a freeze
100%
Daylight
9 h 21 min to 9 h 10 min
Cloud cover
64%
Humidity
85%
Dew point
20°F
Wind
11.4 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
Dec 140°F21°F64°F 19981°F 197620%9%
Dec 239°F21°F63°F 1973-4°F 198520%9%
Dec 339°F20°F66°F 2012-9°F 198520%9%
Dec 438°F20°F66°F 1998-6°F 202520%9%
Dec 538°F20°F65°F 2001-11°F 200520%10%
Dec 637°F19°F53°F 2019-10°F 197220%10%
Dec 737°F19°F62°F 2024-13°F 197620%10%
Dec 837°F19°F60°F 2024-8°F 197620%10%
Dec 936°F18°F57°F 2020-14°F 200520%11%
Dec 1036°F18°F59°F 1979-10°F 197820%11%
Dec 1135°F18°F62°F 1965-12°F 197619%11%
Dec 1235°F18°F65°F 1968-14°F 200019%11%
Dec 1335°F17°F50°F 1998-16°F 198519%11%
Dec 1434°F17°F56°F 1975-14°F 198519%12%
Dec 1534°F17°F73°F 2021-15°F 198919%12%
Dec 1634°F16°F71°F 2021-7°F 198319%12%
Dec 1733°F16°F53°F 1980-12°F 196419%12%
Dec 1833°F16°F63°F 1976-22°F 198518%12%
Dec 1933°F16°F54°F 1988-19°F 198518%12%
Dec 2032°F15°F55°F 1967-18°F 198318%12%
Dec 2132°F15°F52°F 1979-22°F 198918%13%
Dec 2232°F15°F53°F 2019-23°F 198918%13%
Dec 2331°F14°F55°F 1964-24°F 198918%13%
Dec 2431°F14°F54°F 2023-21°F 198318%13%
Dec 2531°F14°F58°F 2019-20°F 198318%13%
Dec 2631°F14°F58°F 2019-11°F 199018%13%
Dec 2730°F13°F54°F 2003-15°F 201718%13%
Dec 2830°F13°F66°F 1984-9°F 199318%13%
Dec 2930°F13°F62°F 1984-8°F 198318%13%
Dec 3030°F13°F59°F 2004-13°F 197618%13%
Dec 3130°F13°F59°F 1965-17°F 197618%13%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Ames, in percent, and of at least 0.1 inch of snowfall.05101520251102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CST).

December 1
sunrise 7:23 AM, sunset 4:44 PM
December 31
sunrise 7:43 AM, sunset 4:53 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00094989 (Ames Muni AP), public domain. Records: NOAA GHCN-Daily, station USC00130200, 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.