Season map
The season map shows the season or season temperature (according to the SMHI season definitions) for the chosen date.
The map only shows the current state, not the season's arrival date. This is because the season's arrival date must be calculated in retrospect. The season map for the current day is created around 8 PM Swedish standard time. From 15 August 2024 the maps are produced with an updated analysis model. This causes a higher level of detail in the maps.
SMHI season definitions
Winter
Winter will arrive after 5 consecutive days with winter temperatures. Winter temperature is daily mean temperature 0.0°C or below, but not yet for 5 consecutive days. The winter arrival date refers to the first day out of 5 with winter temperatures.
Normal winter arrival (in Swedish)
Spring
Spring will arrive after 7 consecutive days with spring temperatures. Spring temperature is daily mean temperature above 0.0°C, but not yet for 7 consecutive days. The spring arrival date refers to the first day out of 7 with spring temperatures. 15 February is set as the earliest allowed date for spring arrival. The latest date for spring arrival is 31 July.
Normal spring arrival (in Swedish)
Summer
Summer will arrive after 5 consecutive days with summer temperatures. Summer temperature is daily mean temperature 10.0°C or above, but not yet for 5 consecutive days. The summer arrival date refers to the first day out of 5 with summer temperatures.
Normal summer arrival (in Swedish)
Autumn
Autumn will arrive after 5 consecutive days with autumn temperatures. Autumn temperature is daily mean temperature below 10.0°C, but not yet for 5 consecutive days. The autumn arrival date refers to the first day out of 5 with autumn temperatures. 1 August is set as the earliest allowed date for autumn arrival. The latest date allowed for autumn arrival is 14 February.