Viewing Station: MI-WS-24 : Ann Arbor 2.6 NNE
May 2, 2012 - Sep 17, 20252,689 Total Observations
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Climatology

Precipitation Normals Comparison

Month-To-Date: 0.19"
September 1-17, 2025(17 of 17 days covered by obs)
NOAA Normal
1.68"
Departure from Normal
-1.49" : 11% of Normal
Year-To-Date: 14.93"
Jan 1 to Sep 17, 2025(260 of 260 days covered by obs)
NOAA Normal
24.57"
Departure from Normal
-9.64" : 61% of Normal
Water Year-To-Date: 18.82"
Oct 1, 2024 to Sep 17, 2025(352 of 352 days covered by obs)
NOAA Normal
31.86"
Departure from Normal
-13.04" : 59% of Normal
MonthNOAA Normals (in)PRISM Normals (in)Diff (in)
Jan
2.09
2.67
-0.58
Feb
1.81
2.24
-0.43
Mar
2.23
2.51
-0.28
Apr
3.09
3.24
-0.15
May
3.72
3.71
0.01
Jun
3.57
3.60
-0.03
Jul
3.22
3.31
-0.09
Aug
3.16
3.33
-0.17
Sep
2.97
2.97
0.00
Oct
2.79
2.86
-0.07
Nov
2.45
2.66
-0.21
Dec
2.05
2.46
-0.41
33.15
35.56
-2.41