Climate of St. Johns

St. Johns has a oceanic climate. There is rainfall during all months of the year. The average annual temperature for St. Johns is 18° degrees and there is about 598 mm of rain in a year. It is dry for 191 days a year with an average humidity of 76% and an UV-index of 4.

Climate averages for the whole year

Day: the average daily temperature during the day is between 4°C and 31°C
Night:the average nighttime temperature is between -4°C and 20°C
Rain: it rains 137 days and there is a total of approximately 600 mm rainfall
Snow: it snows an average of 18 days per year
Sun hours: throughout the year there are 2824 sun hours

Maximum temperature:	between 4°C and 31°C
Warmest month:	31°C in July
Coldest month:	4°C in January
Night temperature:	between -4°C and 20°C
Dry days:	210 days
Days with rain:	137 days
Days with snow:	18 days
Total rain sum:	600 mm
Hours of sunshine:	2824 hours

Climate of St. Johns
Temperature graph
Precipitation graph
Climate chart of St. Johns
The best travel time for St. Johns
Climate of St. Johns by month
Experiences with the weather of St. Johns

Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for St. Johns.

Precipitation graph

This graph shows the average amount of rainfall per month for St. Johns.

Climate table of St. Johns

In this climate table you can see at a glance what the average weather per month is for St. Johns. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for St. Johns might be like in a given month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day temp. (°C)	4	6	13	19	24	30	31	30	26	20	12	6
Night temp. (°C)	-4	-2	4	9	15	19	20	19	16	10	4	-1
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	30	33	60	75	65	71	56	47	43	40	41	39
Days with rain	8	8	14	14	15	14	14	12	11	10	9	8
Days with snow	5	5	2	1	-	-	-	-	-	-	1	4
Dry days	18	15	15	15	16	16	17	19	19	21	20	19
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sun hours per day	5	5	7	9	10	11	11	11	9	6	5	5
Wind force (Bft)	3	3	3	3	3	2	2	2	2	3	3	3
UV-index	2	2	4	4	6	6	6	6	5	3	2	2

Best time to visit St. Johns

The best time to visit St. Johns in the state of Illinois is from April through October. In this period you have a warm temperature and little precipitation. The highest average temperature in St. Johns is 31°C in July and the lowest is 4°C in January.

Climate of St. Johns by month

What is the average climate in a given month for St. Johns? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

January