Frost Dates for Watertown 2 S, SD

Elevation: 540 m

Frost Dates

Last Spring Frost (50%) May 3

First Fall Frost (50%) October 4

30% Probability

Last Spring Frost May 7

First Fall Frost September 29

Hard Freeze (28°F)

Last Spring Hard Freeze April 23

First Fall Hard Freeze October 14

44.87°N, 97.12°W © OpenStreetMap

Growing Season

154 Days May 3 to October 4

USDA Hardiness Zone

Zone 4a

Avg. annual minimum: −30 to −25°F

Learn more

Köppen Climate

Dfa Hot-Summer Continental

Hot summers and cold winters with year-round precipitation. Moderate growing season supports warm-season crops like tomatoes, peppers, and corn. Winter protection extends the harvest.

Köppen climate map

Temperature

0° 30° 60° 90°

13°

Jan

17°

Feb

30°

Mar

44°

Apr

57°

May

66°

Jun

71°

Jul

69°

Aug

61°

Sep

47°

Oct

32°

Nov

19°

Dec

32°F

28°F

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Temperature table

Average monthly temperatures (°F)
Month	Avg High	Avg Temp	Avg Low
January	23°	13°	4°
February	27°	17°	7°
March	40°	30°	20°
April	55°	44°	32°
May	67°	57°	46°
June	77°	66°	56°
July	82°	71°	60°
August	80°	69°	58°
September	72°	61°	49°
October	58°	47°	35°
November	42°	32°	22°
December	28°	19°	10°

Precipitation

0" 2" 4" 5.0"

1.6"

Jan

1.4"

Feb

2.0"

Mar

3.1"

Apr

3.8"

May

4.3"

Jun

5.0"

Jul

4.2"

Aug

3.7"

Sep

3.0"

Oct

1.7"

Nov

1.6"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	1.6
February	1.4
March	2.0
April	3.1
May	3.8
June	4.3
July	5.0
August	4.2
September	3.7
October	3.0
November	1.7
December	1.6

Sunrise / Sunset

Jan: 7:31 AM – 4:29 PM · 8h 58m

Feb: 6:54 AM – 5:06 PM · 10h 11m

Mar: 6:11 AM – 5:49 PM · 11h 38m

Apr: 5:22 AM – 6:38 PM · 13h 16m

May: 4:41 AM – 7:19 PM · 14h 38m

Jun: 4:18 AM – 7:42 PM · 15h 23m

Jul: 4:28 AM – 7:32 PM · 15h 05m

Aug: 5:03 AM – 6:57 PM · 13h 53m

Sep: 5:51 AM – 6:09 PM · 12h 18m

Oct: 6:39 AM – 5:21 PM · 10h 42m

Nov: 7:21 AM – 4:39 PM · 9h 18m

Dec: 7:42 AM – 4:18 PM · 8h 37m

Daylight Longest: 15h 25m · Shortest: 8h 35m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month	Sunrise	Sunset	Daylight
January	7:31 AM	4:29 PM	8h 58m
February	6:54 AM	5:06 PM	10h 11m
March	6:11 AM	5:49 PM	11h 38m
April	5:22 AM	6:38 PM	13h 16m
May	4:41 AM	7:19 PM	14h 38m
June	4:18 AM	7:42 PM	15h 23m
July	4:28 AM	7:32 PM	15h 05m
August	5:03 AM	6:57 PM	13h 53m
September	5:51 AM	6:09 PM	12h 18m
October	6:39 AM	5:21 PM	10h 42m
November	7:21 AM	4:39 PM	9h 18m
December	7:42 AM	4:18 PM	8h 37m

Nearby Stations

Watertown Rgnl AP, SD May 7 - September 30 Rauville 2 W, SD May 7 - September 28 Castlewood #2, SD May 6 - October 1 Castlewood, SD May 10 - September 27 Clear Lake, SDMay 7 - October 1 Summit 1 W, SD May 14 - September 28

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