June weather forecastLittleton, CO

June
Weather in June
In June, the weather in Littleton, Colorado, transitions into full-fledged summer, characterized by the highest average temperatures of 82.2°F (27.9°C) throughout the year. However, it is not just the rising mercury levels that earmark the advent of summer. The noticeable disappearance of snow, the arrival of 14.9 hours of daylight, and a modest amount of rainfall contribute to the sunny, temperate environment. The region typically experiences a drop in relative humidity, producing warm, pleasant, and dry conditions that make it an ideal time for outdoor activities.Temperature
Littleton's June weather is marked by a distinct rise in high-temperatures, escalating from a comfortable 67.5°F (19.7°C) in May to a warm 82.2°F (27.9°C). Littleton logs a notable disparity from the daily highs during June, as the nighttime temperature lowers to an average of 54.7°F (12.6°C).Heat index
For most parts of June, the heat index is calculated to be 82.4°F (28°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.Heat index readings emphasize conditions of light breezes and shaded spots. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', binds temperature metrics with humidity values to give a sense of the actual warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Humidity
June and August, with an average relative humidity of 41%, are the least humid months.Rainfall
In June, the rain falls for 10.9 days. Throughout June, 1.18" (30mm) of precipitation is accumulated. In Littleton, during the entire year, the rain falls for 101.2 days and collects up to 11.89" (302mm) of precipitation.Snowfall
In Littleton, Colorado, snow does not fall in June through September.Daylight
The month with the longest days in Littleton is June, with an average of 14h and 54min of daylight.On the first day of June in Littleton, sunrise is at 5:34 am and sunset at 8:22 pm. On the last day of the month, sunrise is at 5:36 am and sunset at 8:31 pm MDT.
Sunshine
June through August, with an average of 11.8h of sunshine, are months with the most sunshine.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Littleton. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in June converts into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in June
Littleton, CO
- Average high temperature in June: 82.2°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (41°F).
- Average low temperature in June: 54.7°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is December (21°F).
Average pressure in June
Littleton, CO
- Average pressure in June: 29.92"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is April (29.91"Hg).
Average wind speed in June
Littleton, CO
- Average wind speed in June: 6.5mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is September (6mph).
Average humidity in June
Littleton, CO
- Average humidity in June: 41%
The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June and August (41%).
Average rainfall in June
Littleton, CO
- Average rainfall in June: 1.18"
The wettest month (with the highest rainfall) is May (2.05").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in June
Littleton, CO
- Average rainfall days in June: 10.9 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (3 days).
Average snowfall in June
Littleton, CO
- Average snowfall in June: 0"
The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in June
Littleton, CO
- Average snowfall days in June: 0 days
The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in June /
Average sunshine in June
Littleton, CO
- Average daylight in June: 14h and 54min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in June: 11h and 48min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in June
Littleton, CO
- Average sunshine days in June: 13.6 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is July (10 days).
Average UV index in June
Littleton, CO
- Average UV index in June: 6
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in June
Littleton, CO
- Average cloud cover in June: 16
The month with the most cloud cover is April (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 14).
Average visibility in June
Littleton, CO
- Average visibility in June: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).





