Frost Dates for Pactola Dam, SD

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 28
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. September 18
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.

Last Spring Frost June 1
First Fall Frost September 12

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 15
First Fall Hard Freeze September 29
44.06°N, -103.48°W © OpenStreetMap

Growing Season

113 Days May 28 to September 18

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 4b

Learn more

Temperature

10° 30° 50° 70°
24°
High: 36°
Avg: 24°
Low: 11°
Jan
24°
High: 36°
Avg: 24°
Low: 11°
Feb
31°
High: 44°
Avg: 31°
Low: 19°
Mar
38°
High: 51°
Avg: 38°
Low: 26°
Apr
48°
High: 60°
Avg: 48°
Low: 36°
May
58°
High: 71°
Avg: 58°
Low: 45°
Jun
65°
High: 79°
Avg: 65°
Low: 51°
Jul
63°
High: 78°
Avg: 63°
Low: 49°
Aug
55°
High: 69°
Avg: 55°
Low: 40°
Sep
42°
High: 55°
Avg: 42°
Low: 29°
Oct
32°
High: 45°
Avg: 32°
Low: 20°
Nov
25°
High: 37°
Avg: 25°
Low: 13°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.3"
1.2"
1.24"
Jan
1.3"
1.27"
Feb
2.2"
2.23"
Mar
3.2"
3.18"
Apr
4.3"
4.34"
May
4.2"
4.21"
Jun
3.7"
3.72"
Jul
4.2"
4.21"
Aug
3.2"
3.20"
Sep
2.8"
2.78"
Oct
1.7"
1.70"
Nov
1.3"
1.33"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:29 AM – 4:31 PM · 9h 03m
Feb: 6:53 AM – 5:07 PM · 10h 14m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:23 AM – 6:37 PM · 13h 14m
May: 4:43 AM – 7:17 PM · 14h 34m
Jun: 4:21 AM – 7:39 PM · 15h 17m
Jul: 4:30 AM – 7:30 PM · 14h 59m
Aug: 5:05 AM – 6:55 PM · 13h 50m
Sep: 5:51 AM – 6:09 PM · 12h 17m
Oct: 6:38 AM – 5:22 PM · 10h 45m
Nov: 7:19 AM – 4:41 PM · 9h 23m
Dec: 7:39 AM – 4:21 PM · 8h 43m
Daylight Longest: 15h 19m · Shortest: 8h 41m

Nearby Stations

Johnson Siding, SD May 20 - September 25 Hill City, SD June 1 - September 10 Rapid City 4nw, SD May 10 - October 5 Mt Rushmore Nmem, SD May 15 - October 1 Rapid City Wfo, SD May 3 - October 8 Rochford 2 Wnw, SD

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