Frost Dates for RUIAN, China
Elevation: 12 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.
January 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.
December 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
January 29
First Fall Frost
December 21
Growing Season
335 Days
January 24 to December 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
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Cfa
Humid Subtropical
Hot, humid summers and mild winters with rain year-round. Long growing seasons support a wide variety of vegetables, fruits, and ornamentals. The most common climate in the eastern US.
Temperature
5°
15°
25°
Avg High
Avg Temp
Avg Low
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 12° | 9° | 5° |
| February | 13° | 9° | 6° |
| March | 15° | 12° | 9° |
| April | 20° | 17° | 14° |
| May | 24° | 21° | 19° |
| June | 27° | 25° | 23° |
| July | 30° | 28° | 26° |
| August | 30° | 28° | 26° |
| September | 28° | 25° | 23° |
| October | 24° | 21° | 18° |
| November | 19° | 16° | 13° |
| December | 14° | 11° | 7° |
Precipitation
0 mm
75 mm
150 mm
225 mm
300 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 64 |
| February | 69 |
| March | 109 |
| April | 127 |
| May | 178 |
| June | 290 |
| July | 201 |
| August | 262 |
| September | 178 |
| October | 76 |
| November | 69 |
| December | 48 |
Sunrise / Sunset
Daylight
Longest: 13h 46m · Shortest: 10h 14m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 6:47 AM | 5:13 PM | 10h 25m |
| February | 6:29 AM | 5:31 PM | 11h 03m |
| March | 6:06 AM | 5:54 PM | 11h 48m |
| April | 5:40 AM | 6:20 PM | 12h 40m |
| May | 5:19 AM | 6:41 PM | 13h 23m |
| June | 5:08 AM | 6:52 PM | 13h 45m |
| July | 5:12 AM | 6:48 PM | 13h 36m |
| August | 5:30 AM | 6:30 PM | 12h 59m |
| September | 5:55 AM | 6:05 PM | 12h 09m |
| October | 6:20 AM | 5:40 PM | 11h 19m |
| November | 6:42 AM | 5:18 PM | 10h 36m |
| December | 6:53 AM | 5:07 PM | 10h 15m |
Nearby Stations
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