Frost Dates for Saint Marys, OH

Based on data from Celina 3 Ne weather station, 8 miles away

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. April 27
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. October 19
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 May 2
First Fall Frost October 13

Hard Freeze (28°F)

Last Spring Hard Freeze April 15
First Fall Hard Freeze October 31
40.54°N, -84.39°W © OpenStreetMap

Growing Season

175 Days April 27 to October 19

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 6a

Avg. annual minimum: −10 to −5°F (−23 to −21°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

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

10° 30° 50° 70° 90°
26°
High: 34°F
Avg: 26°F
Low: 19°F
Jan
30°
High: 38°F
Avg: 30°F
Low: 22°F
Feb
39°
High: 49°F
Avg: 39°F
Low: 30°F
Mar
51°
High: 63°F
Avg: 51°F
Low: 40°F
Apr
62°
High: 73°F
Avg: 62°F
Low: 51°F
May
71°
High: 81°F
Avg: 71°F
Low: 60°F
Jun
73°
High: 84°F
Avg: 73°F
Low: 63°F
Jul
72°
High: 82°F
Avg: 72°F
Low: 61°F
Aug
66°
High: 77°F
Avg: 66°F
Low: 54°F
Sep
54°
High: 65°F
Avg: 54°F
Low: 44°F
Oct
42°
High: 50°F
Avg: 42°F
Low: 33°F
Nov
31°
High: 38°F
Avg: 31°F
Low: 24°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 7.9"
3.7"
3.74"
Jan
3.2"
3.24"
Feb
4.7"
4.73"
Mar
5.1"
5.10"
Apr
5.8"
5.77"
May
6.6"
6.61"
Jun
7.9"
7.87"
Jul
7.8"
7.80"
Aug
6.2"
6.20"
Sep
5.2"
5.22"
Oct
4.8"
4.80"
Nov
4.4"
4.44"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:18 AM – 4:42 PM · 9h 24m
Feb: 6:47 AM – 5:13 PM · 10h 27m
Mar: 6:10 AM – 5:50 PM · 11h 41m
Apr: 5:27 AM – 6:33 PM · 13h 05m
May: 4:52 AM – 7:08 PM · 14h 15m
Jun: 4:33 AM – 7:27 PM · 14h 53m
Jul: 4:41 AM – 7:19 PM · 14h 38m
Aug: 5:12 AM – 6:48 PM · 13h 37m
Sep: 5:52 AM – 6:08 PM · 12h 15m
Oct: 6:33 AM – 5:27 PM · 10h 53m
Nov: 7:09 AM – 4:51 PM · 9h 42m
Dec: 7:27 AM – 4:33 PM · 9h 07m
Daylight Longest: 14h 54m · Shortest: 9h 06m

Nearby Stations

Van Wert 1 S, OH April 21 - October 26 Berne Wwtp, IN April 23 - October 22 Lima Wwtp, OH April 24 - October 24 Portland 1 Sw, IN April 28 - October 15 Decatur 1 N, IN April 23 - October 19 Lima Allen Co AP, OH April 22 - October 22

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