Weather Almanac: Ypsilanti, MI 48197

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 3.37"
September days below freezing
📉 ≈0.1 days
Average September lows ≈50.0°F
USDA Zone
6a
Annual extreme lows -10°F to -5°F
Last Spring Frost (36°F)
🌷 May 22
First Fall Frost (36°F)
🍂 Sep 26
Mon. September 1 Labor Day  

🌅 7:00 a.m.

H: ≈79.7°F

L: ≈55.5°F

🌇 8:07 p.m.

Tue. September 2  

🌅 7:01 a.m.

H: ≈79.5°F

L: ≈55.2°F

🌇 8:06 p.m.

Wed. September 3  

🌅 7:02 a.m.

H: ≈79.3°F

L: ≈54.9°F

🌇 8:04 p.m.

Thu. September 4  

🌅 7:03 a.m.

H: ≈79.1°F

L: ≈54.6°F

🌇 8:02 p.m.

Fri. September 5  

🌅 7:04 a.m.

H: ≈78.8°F

L: ≈54.3°F

🌇 8:00 p.m.

Sat. September 6  

🌅 7:05 a.m.

H: ≈78.5°F

L: ≈54.0°F

🌇 7:59 p.m.

Sun. September 7 🌕

🌅 7:06 a.m.

H: ≈78.3°F

L: ≈53.6°F

🌇 7:57 p.m.

Mon. September 8  

🌅 7:07 a.m.

H: ≈78.0°F

L: ≈53.3°F

🌇 7:55 p.m.

Tue. September 9  

🌅 7:08 a.m.

H: ≈77.6°F

L: ≈52.9°F

🌇 7:54 p.m.

Wed. September 10  

🌅 7:09 a.m.

H: ≈77.3°F

L: ≈52.5°F

🌇 7:52 p.m.

Thu. September 11  

🌅 7:10 a.m.

H: ≈77.0°F

L: ≈52.1°F

🌇 7:50 p.m.

Fri. September 12  

🌅 7:11 a.m.

H: ≈76.6°F

L: ≈51.7°F

🌇 7:48 p.m.

Sat. September 13  

🌅 7:12 a.m.

H: ≈76.2°F

L: ≈51.3°F

🌇 7:47 p.m.

Sun. September 14 Holy Cross 🌗

🌅 7:13 a.m.

H: ≈75.8°F

L: ≈50.8°F

🌇 7:45 p.m.

Mon. September 15  

🌅 7:14 a.m.

H: ≈75.4°F

L: ≈50.4°F

🌇 7:43 p.m.

Tue. September 16  

🌅 7:15 a.m.

H: ≈75.0°F

L: ≈50.0°F

🌇 7:41 p.m.

Wed. September 17  

🌅 7:16 a.m.

H: ≈74.6°F

L: ≈49.5°F

🌇 7:39 p.m.

Thu. September 18  

🌅 7:18 a.m.

H: ≈74.1°F

L: ≈49.1°F

🌇 7:38 p.m.

Fri. September 19  

🌅 7:19 a.m.

H: ≈73.7°F

L: ≈48.6°F

🌇 7:36 p.m.

Sat. September 20  

🌅 7:20 a.m.

H: ≈73.2°F

L: ≈48.2°F

🌇 7:34 p.m.

Sun. September 21 🌑

🌅 7:21 a.m.

H: ≈72.8°F

L: ≈47.7°F

🌇 7:32 p.m.

Mon. September 22 Autumn Equinox  

🌅 7:22 a.m.

H: ≈72.3°F

L: ≈47.3°F

🌇 7:31 p.m.

Tue. September 23  

🌅 7:23 a.m.

H: ≈71.8°F

L: ≈46.8°F

🌇 7:29 p.m.

Wed. September 24  

🌅 7:24 a.m.

H: ≈71.4°F

L: ≈46.4°F

🌇 7:27 p.m.

Thu. September 25  

🌅 7:25 a.m.

H: ≈70.9°F

L: ≈45.9°F

🌇 7:25 p.m.

Fri. September 26  

🌅 7:26 a.m.

H: ≈70.4°F

L: ≈45.5°F

🌇 7:24 p.m.

Sat. September 27  

🌅 7:27 a.m.

H: ≈69.9°F

L: ≈45.1°F

🌇 7:22 p.m.

Sun. September 28  

🌅 7:28 a.m.

H: ≈69.4°F

L: ≈44.7°F

🌇 7:20 p.m.

Mon. September 29 🌓

🌅 7:29 a.m.

H: ≈69.0°F

L: ≈44.2°F

🌇 7:18 p.m.

Tue. September 30  

🌅 7:30 a.m.

H: ≈68.5°F

L: ≈43.8°F

🌇 7:17 p.m.


Temperature climatic data from weather station: ANN ARBOR SE (USC00200228)

Precipitation climatic data from weather station: ANN ARBOR SE (USC00200228)

Agricultural climatic data from weather station: DETROIT WILLOW RUN AP (USW00014853)