Watertown Weather Records

Watertown, South Dakota weather averages and records from 1893–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Watertown, South Dakota was 110 °F which occurred on July 21, 1934.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Watertown, South Dakota was -40 °F which occurred on January 13, 1916.
Lowest Temperatures: All-Time By Year
Watertown Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 21.6 3.3 65 -40 0.5 7.1
February 26.1 6.9 66 -38 0.6 9.0
March 38.9 19.7 82 -27 1.0 5.4
April 54.4 31.8 95 -10 2.1 5.2
May 67.3 44.7 106 16 2.8 0.1
June 77.0 55.5 107 25 3.9 0.0
July 82.1 60.1 110 35 3.0 0.0
August 79.8 57.7 105 32 2.9 0.0
September 71.8 48.7 104 9 2.5 0.0
October 56.5 35.4 91 -2 1.9 1.4
November 39.9 21.5 78 -20 0.7 4.4
December 26.5 9.5 69 -37 0.7 8.8
Entire year 53.7 33.2 110 -40 22.7 41.0
More Watertown Weather Records
1893–2024
Highest daily low 78 °F July 16, 2012
Lowest daily high -25 °F February 8, 1899
Greatest daily range
(Difference of high and low)
61 °F April 24, 1899
Greatest difference in daily high
over two conscutive days
46 °F May 1–2, 1913
Most daily precipitation 7.1 inches May 27, 1931
Most monthly precipitation 11.4 inches June 1991
Most yearly precipitation 40.0 inches 1977
Most yearly days with precipitation 130 2019
Earliest snow in season September 21 1995
Latest snow in season May 14 1907
Most daily snow 19.0 inches April 25, 2008
Most monthly snow 29.5 inches April 2008
Most yearly snow 79.5 inches 2019
Most snow in a winter 81.7 inches 2018–2019
Greatest snow accumulation 42.0 inches January 31, 2011
Earliest freeze September 3 1974
Earliest day ≥ 80 °F March 18 2012
Earliest day ≥ 90 °F April 18 1985
Earliest day ≥ 100 °F May 28 1934
Latest freeze June 21 1902
Latest day ≥ 80 °F October 30 1950
Latest day ≥ 90 °F October 5 1963
Latest day ≥ 100 °F September 10 1931
Most days in a year < 0 °F 68 1978
Most days in a year < 32 °F 196 1916
Most days in a year ≥ 80 °F 109 1936
Most days in a year ≥ 90 °F 53 1933
Most days in a year ≥ 100 °F 17 1933
Most days in a year ≥ 110 °F 1 1934
Watertown Weather Streaks
Most consecutive days...
With precipitation 10 days Apr 25 – May 4, 2024
Without precipitation 72 days Nov 16, 1943 – Jan 26, 1944
With snow 7 days Dec 21–27, 2009
High temperature at or
below freezing
68 days Dec 18, 1977 – Feb 23, 1978
High temperature ≥ 80 °F 60 days Jul 6 – Sep 3, 1983
High temperature ≥ 90 °F 16 days Jul 4–19, 1936
High temperature ≥ 100 °F 10 days Jul 9–18, 1936
Plant Hardiness Zone
4B
Watertown is in plant hardiness zone 4B
based on average yearly minimum temperature from 1991–2020
Watertown Weather by Year
More Watertown Weather
Compare Watertown to
Weather Station Details
Years Station Coordinates
1893–2024 Watertown Regional Airport location