Contents
- Weather in June
- Frequently asked questions
- Average temperature in June
- Average pressure in June
- Average wind speed in June
- Average humidity in June
- Average rainfall in June
- Average rainfall days in June
- Average snowfall in June
- Average snowfall days in June
- Average daylight in June
- Average sunshine in June
- Average sunshine days in June
- Average UV index in June
- Average cloud cover in June
- Average visibility in June
Weather in June
Temperature
Johnston's June weather shows an increase in high-temperatures, moving from May's agreeable 69.6°F (20.9°C) to a warm 79.3°F (26.3°C). During the month of June, Johnston's nighttime temperature lowers to an average of 62.4°F (16.9°C).Humidity
In June, the average relative humidity in Johnston is 81%.Rainfall
The months with the most rainfall are May and June, with an average 2.52" (64mm) of precipitation.Snowfall
In Johnston, snow does not fall in June through September.Daylight
The month with the longest days is June, with an average of 15h and 12min of daylight.On the first day of the month, sunrise is at 5:42 am and sunset at 8:43 pm. On the last day of June, in Johnston, sunrise is at 5:44 am and sunset at 8:53 pm CDT.
Sunshine
In Johnston, the average sunshine in June is 9.8h.UV index
The months with the highest UV index in Johnston are June and July, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.Note: In June, an average UV index of 6 transforms into the following instructions:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What are the temperatures in Johnston in June?
What is the average humidity in June in Johnston?
What is the rainiest month in Johnston?
How many days does it rain in June in Johnston?
When it does not snow in Johnston?
Does it snow in Johnston in June?
When are the longest days in Johnston?
How many hours of daylight does Johnston have in June?
When are sunrise and sunset in June in Johnston?
How long on average sun shines in June in Johnston?
When is the highest UV index in Johnston?
How high is the UV index in June in Johnston?
Average temperature in June
Johnston, IA
- Average high temperature in June: 79.3°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in June: 62.4°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in June
Johnston, IA
- Average pressure in June: 29.88"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in June
Johnston, IA
- Average wind speed in June: 8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in June
Johnston, IA
- Average humidity in June: 81%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in June
Johnston, IA
- Average rainfall in June: 2.52"
The wettest months (with the highest rainfall) are May and June (2.52").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in June
Johnston, IA
- Average rainfall days in June: 15.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3.5 days).
Average snowfall in June
Johnston, IA
- Average snowfall in June: 0"
The month with the highest snowfall is January (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in June
Johnston, IA
- Average snowfall days in June: 0 days
The month with the highest number of snowfall days is January (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in June /
Average sunshine in June
Johnston, IA
- Average daylight in June: 15h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in June: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in June
Johnston, IA
- Average sunshine days in June: 11.2 days
The month with the most sunshine days is December (22.8 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in June
Johnston, IA
- Average UV index in June: 6
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in June
Johnston, IA
- Average cloud cover in June: 34
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in June
Johnston, IA
- Average visibility in June: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Johnston, Iowa, USA
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