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Public Information Statement
National Weather Service La Crosse WI
248 AM CDT Tue Sep 1 2026

...Rochester MN August 2026 Climate Summary...

...August 2026 Highlights...

Temperatures - Warmer than Normal

The average temperature at Rochester International Airport was 70F.
This was 1.8F warmer than the 1991-2020 normal of 68.2F.

The average high temperature was 79.6F. This was 1.6F warmer than
the 1991-2020 normal of 78F.

The average low temperature was 60.5F. This was 2.2F warmer than
the 1991-2020 normal of 58.3F. This was the 16th warmest. It was
the warmest since 2016 (60.6F - tied for the 14th warmest with
1998). The warmest was 64.9F in 1947.

The warmest high temperature was 86F on August 31.
The coldest high temperature was 72F on August 4.

The warmest low temperature was 69F on August 31. The coldest low
temperature was 51F on August 23.

There were no days in which the temperature was 90F or warmer. The
1886-2025 average is 2.7 days.

Rainfall - 9th driest
   10 Driest Augusts   in Rochester, MN       1886-2026

Rank   Rainfall     Year
----   --------     ---- 1    0.31 inches   1941 2    0.34 inches
2003 3    0.65 inches   1949 4    0.92 inches   1908 5    0.96
inches   2011      0.96 inches   1886 7    1.03 inches   1933 8 1.17
inches   1970 9    1.24 inches   2026 10    1.41 inches   1950
A total of 1.24 inches of rain fell at Rochester International
Airport. This was 2.88 inches drier than the 1991-2020 normal of
4.12 inches. This was the 9th driest August and the driest since
2011 (0.96 inches - tied for 5th driest with 1886). The driest
August occurred in 1941 when just 0.31 inches of rain fell. Below
are the 10 driest Augusts.

   10 Driest Augusts
   in Rochester, MN
       1886-2026

Rank   Rainfall     Year
----   --------     ----
 1    0.31 inches   1941
 2    0.34 inches   2003
 3    0.65 inches   1949
 4    0.92 inches   1908
 5    0.96 inches   2011
      0.96 inches   1886
 7    1.03 inches   1933
 8    1.17 inches   1970
 9    1.24 inches   2026
10    1.41 inches   1950

The wettest day occurred on August 4 when 0.40 inches of rain fell.

Rain fell on 11 days (8 with measurable rain and 3 days with a
trace).

...August 2026 Records...

Daily Records...

None.

...Looking Ahead to September

The normal high temperature in Rochester starts off at 76F on
September 1st and falls to 66F by the end of the month. The normal
low temperature starts off at 56F on the 1st and falls to 45F by
the end of the month. The warmest September temperature on record is
100F on September 6, 1913, and the coldest was 22F on September
28, 1942.

The normal mean temperature for September is 61.1F.  Rochesters
hottest September occurred in 1908 with an average temperature of
69.5F, and its coldest September occurred in 1993 with an average
temperature of 53.6F.

The normal September rainfall is 3.60 inches. The wettest September
was in 1986 with 10.50 inches of rain, while the driest September
occurred in 1953, with only 0.33 inches of precipitation. The
wettest September day occurred on September 12, 1978, when 5.98
inches of rain fell. Normally, there are 5 days with thunderstorms.

While typically no snow falls during September, measurable snow did
fall in 1942 (0.3 inches on September 26) and 1961 (0.8 inches on
September 30).

$$

Boyne