This webpage features historical frost and heat maps for the South West Land Division.
The maps detail occurrence and severity of historical frost (days below 2°C) for July to October 1975 through to 2023 and historical heat (days above 30°C) for the months of August to October, 1975 through to 2023 for the South West Land Division.
Historical frost maps, where the temperature recorded is below 2oC, can show us just how variable frost risk can be.
The maps listed include frost severity, which records the minimum temperature and frost occurrence and the number of days in a month or multiple months when the minimum temperature is below 2oC.
Links to frost severity and occurrence maps for the period 1975 to 2023 are provided below:
| Month/s | Frost |
|---|---|
| July | Severity [1] Occurrence [2] |
| August | Severity [3] Occurrence [4] |
| September | Severity [5] Occurrence [6] |
| October | Severity [7] Occurrence [8] |
| August to October | Severity [9] Occurrence [10] |
Heat stress, in this case recorded as days above 30°C in August to October, is a limiting factor to crop yield and puts stress on livestock.
Heat severity [11] and occurrence [12] maps are also provided for the period August to October, 1975 to 2023.
The maps below show the average number of frost and heat days for August to October for the years 1975 to 2023:
[13]
[14]The maps below show the average number of days below 2°C for July, August, September and October for the years 1975 to 2023:
[15]
[16]
[17]
[18]