Frost Dates for Northwood, IA

Elevation: 363 m

Frost Dates

Last Spring Frost (50%) May 4

First Fall Frost (50%) October 4

30% Probability

Last Spring Frost May 9

First Fall Frost September 28

Hard Freeze (28°F)

Last Spring Hard Freeze April 24

First Fall Hard Freeze October 13

43.44°N, 93.23°W © OpenStreetMap

Growing Season

153 Days May 4 to October 4

USDA Hardiness Zone

Zone 4b

Avg. annual minimum: −25 to −20°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° 20° 40° 60° 80°

13°

Jan

17°

Feb

30°

Mar

43°

Apr

56°

May

66°

Jun

69°

Jul

67°

Aug

59°

Sep

46°

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	21°	13°	4°
February	26°	17°	8°
March	38°	30°	21°
April	54°	43°	33°
May	66°	56°	45°
June	76°	66°	56°
July	79°	69°	59°
August	76°	67°	57°
September	71°	59°	48°
October	57°	46°	35°
November	41°	32°	23°
December	27°	19°	11°

Precipitation

0" 3" 6" 8.9"

2.3"

Jan

2.5"

Feb

3.7"

Mar

6.0"

Apr

6.4"

May

7.2"

Jun

8.9"

Jul

7.4"

Aug

6.5"

Sep

4.7"

Oct

3.2"

Nov

3.0"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	2.3
February	2.5
March	3.7
April	6.0
May	6.4
June	7.2
July	8.9
August	7.4
September	6.5
October	4.7
November	3.2
December	3.0

Sunrise / Sunset

Jan: 7:27 AM – 4:33 PM · 9h 07m

Feb: 6:52 AM – 5:08 PM · 10h 17m

Mar: 6:11 AM – 5:49 PM · 11h 39m

Apr: 5:24 AM – 6:36 PM · 13h 12m

May: 4:45 AM – 7:15 PM · 14h 30m

Jun: 4:24 AM – 7:36 PM · 15h 13m

Jul: 4:32 AM – 7:28 PM · 14h 55m

Aug: 5:06 AM – 6:54 PM · 13h 47m

Sep: 5:52 AM – 6:08 PM · 12h 17m

Oct: 6:37 AM – 5:23 PM · 10h 46m

Nov: 7:17 AM – 4:43 PM · 9h 26m

Dec: 7:36 AM – 4:24 PM · 8h 47m

Daylight Longest: 15h 14m · Shortest: 8h 46m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month	Sunrise	Sunset	Daylight
January	7:27 AM	4:33 PM	9h 07m
February	6:52 AM	5:08 PM	10h 17m
March	6:11 AM	5:49 PM	11h 39m
April	5:24 AM	6:36 PM	13h 12m
May	4:45 AM	7:15 PM	14h 30m
June	4:24 AM	7:36 PM	15h 13m
July	4:32 AM	7:28 PM	14h 55m
August	5:06 AM	6:54 PM	13h 47m
September	5:52 AM	6:08 PM	12h 17m
October	6:37 AM	5:23 PM	10h 46m
November	7:17 AM	4:43 PM	9h 26m
December	7:36 AM	4:24 PM	8h 47m

Nearby Stations

Albert Lea 3se, MN April 27 - October 9 Mason City, IA April 29 - October 7 Austin Waste Wtp Facility, MN April 30 - October 5 Mason City Muni AP, IA May 3 - October 1 Forest City 2 Nne, IA April 30 - October 7 Osage, IAApril 30 - October 9

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