Weather Almanac: Westmont, IL 60559

🗓️ Historical norms for December 2025

November January

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

December avg. precipitation

🌧️ 2.37"

December days below freezing

📉 ≈28.9 days

Average December lows ≈18.8°F

USDA Zone

Annual extreme lows -10°F to -5°F

Last Spring Frost (36°F)

🌷 May 28

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First Fall Frost (36°F)

🍂 Sep 23

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F: Forecast

H: Normal High Temp

L: Normal Low Temp

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Mon. December 1

🌅 7:00 a.m.

H: ≈40.4°F

L: ≈22.6°F

🌇 4:21 p.m.

Tue. December 2

🌅 7:01 a.m.

H: ≈39.9°F

L: ≈22.2°F

🌇 4:21 p.m.

Wed. December 3

🌅 7:02 a.m.

H: ≈39.5°F

L: ≈21.9°F

🌇 4:21 p.m.

Thu. December 4

🌅 7:03 a.m.

H: ≈39.0°F

L: ≈21.6°F

🌇 4:21 p.m.

Fri. December 5

🌅 7:04 a.m.

H: ≈38.6°F

L: ≈21.3°F

🌇 4:21 p.m.

Sat. December 6

🌅 7:05 a.m.

H: ≈38.2°F

L: ≈21.0°F

🌇 4:21 p.m.

Sun. December 7

🌅 7:05 a.m.

H: ≈37.8°F

L: ≈20.7°F

🌇 4:20 p.m.

Mon. December 8

🌅 7:06 a.m.

H: ≈37.4°F

L: ≈20.4°F

🌇 4:20 p.m.

Tue. December 9

🌅 7:07 a.m.

H: ≈37.0°F

L: ≈20.1°F

🌇 4:20 p.m.

Wed. December 10

🌅 7:08 a.m.

H: ≈36.6°F

L: ≈19.9°F

🌇 4:21 p.m.

Thu. December 11

🌅 7:09 a.m.

H: ≈36.2°F

L: ≈19.6°F

🌇 4:21 p.m.

Fri. December 12

🌅 7:10 a.m.

H: ≈35.9°F

L: ≈19.4°F

🌇 4:21 p.m.

Sat. December 13

🌅 7:10 a.m.

H: ≈35.5°F

L: ≈19.1°F

🌇 4:21 p.m.

Sun. December 14

🌅 7:11 a.m.

H: ≈35.2°F

L: ≈18.9°F

🌇 4:21 p.m.

Mon. December 15

🌅 7:12 a.m.

H: ≈34.9°F

L: ≈18.7°F

🌇 4:21 p.m.

Tue. December 16

🌅 7:13 a.m.

H: ≈34.6°F

L: ≈18.5°F

🌇 4:22 p.m.

Wed. December 17

🌅 7:13 a.m.

H: ≈34.3°F

L: ≈18.3°F

🌇 4:22 p.m.

Thu. December 18

🌅 7:14 a.m.

H: ≈34.1°F

L: ≈18.1°F

🌇 4:22 p.m.

Fri. December 19

🌅 7:14 a.m.

H: ≈33.8°F

L: ≈17.9°F

🌇 4:23 p.m.

Sat. December 20

🌅 7:15 a.m.

H: ≈33.5°F

L: ≈17.7°F

🌇 4:23 p.m.

Sun. December 21 Winter Solstice

🌅 7:16 a.m.

H: ≈33.3°F

L: ≈17.6°F

🌇 4:24 p.m.

Mon. December 22

🌅 7:16 a.m.

H: ≈33.1°F

L: ≈17.4°F

🌇 4:24 p.m.

Tue. December 23

🌅 7:16 a.m.

H: ≈32.9°F

L: ≈17.2°F

🌇 4:25 p.m.

Wed. December 24 Christmas Eve

🌅 7:17 a.m.

H: ≈32.7°F

L: ≈17.1°F

🌇 4:26 p.m.

Thu. December 25 Christmas Day

🌅 7:17 a.m.

H: ≈32.5°F

L: ≈16.9°F

🌇 4:26 p.m.

Fri. December 26

🌅 7:18 a.m.

H: ≈32.3°F

L: ≈16.8°F

🌇 4:27 p.m.

Sat. December 27

🌅 7:18 a.m.

H: ≈32.1°F

L: ≈16.6°F

🌇 4:28 p.m.

Sun. December 28

🌅 7:18 a.m.

H: ≈31.9°F

L: ≈16.5°F

🌇 4:28 p.m.

Mon. December 29

🌅 7:18 a.m.

H: ≈31.8°F

L: ≈16.3°F

🌇 4:29 p.m.

Tue. December 30

🌅 7:19 a.m.

H: ≈31.6°F

L: ≈16.2°F

🌇 4:30 p.m.

Wed. December 31

🌅 7:19 a.m.

H: ≈31.5°F

L: ≈16.1°F

🌇 4:31 p.m.

November January

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: LISLE-MORTON ARBORETUM (USC00115097)

Precipitation climatic data from weather station: OAK BROOK 2W (USC00116281)

Agricultural climatic data from weather station: WHEATON 3 SE (USC00119221)