Frost Dates for Ballywalter, United Kingdom

Based on data from Stormont Castle weather station, 14 miles away

Elevation: 9 m

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. March 24
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. November 24

30% Probability

Only 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 April 6
First Fall Frost November 14

Hard Freeze (−2°C)

Last Spring Hard Freeze February 12
First Fall Hard Freeze December 20
54.54°N, 5.48°W © OpenStreetMap

Growing Season

245 Days March 24 to November 24

USDA Hardiness Zone

Hardiness 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 9b

Avg. annual minimum: −4 to −1°C

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Cfb Oceanic (Marine West Coast)

Mild year-round with cool summers and wet winters. Excellent for cool-season crops like brassicas, peas, and root vegetables. Extended harvest seasons but summer heat-loving crops may struggle.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January8°5°3°
February9°6°3°
March10°7°3°
April13°9°5°
May15°11°7°
June18°14°10°
July19°16°12°
August19°15°12°
September17°13°10°
October14°11°8°
November10°8°5°
December8°6°3°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January91
February76
March84
April66
May71
June79
July79
August86
September76
October97
November107
December99

Sunrise / Sunset

Daylight Greenwich Mean Time (GMT) Longest: 17h 01m · Shortest: 6h 59m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Greenwich Mean Time (GMT))
Month Sunrise Sunset Daylight
January8:46 AM4:20 PM7h 34m
February7:56 AM5:20 PM9h 25m
March6:49 AM6:17 PM11h 28m
April6:30 AM8:18 PM13h 48m
May5:25 AM9:14 PM15h 49m
June4:54 AM9:53 PM16h 59m
July5:14 AM9:44 PM16h 30m
August6:07 AM8:48 PM14h 42m
September7:05 AM7:30 PM12h 25m
October8:04 AM6:13 PM10h 10m
November8:05 AM4:11 PM8h 06m
December8:49 AM3:50 PM7h 01m

Nearby Stations

Hillsborough, United Kingdom April 19 - November 10 Aldergrove, United Kingdom April 14 - November 8 Armagh, United Kingdom April 13 - November 9 Ronaldsway, United Kingdom March 11 - November 28 Glenlee, United Kingdom May 12 - October 8 Auchincruive, United Kingdom April 28 - October 26

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