Climate and monthly weather forecastEureka, MO
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Eureka, Missouri, with an average temperature ranging between max 38.5°F (3.6°C) and min 24.6°F (-4.1°C). Eureka's January weather, with an average high temperature of 38.5°F (3.6°C) and an average low temperature of 24.6°F (-4.1°C), tends to be the coldest of the year. Weather in January »Weather in February
The last month of the winter, February, is a frosty month in Eureka, Missouri, with an average temperature fluctuating between 43°F (6.1°C) and 28°F (-2.2°C). The ushering in of February brings an average high-temperature of a chilly 43°F (6.1°C), closely mirroring the 38.5°F (3.6°C) of January. Weather in February »Weather in March
March, the first month of the spring in Eureka, is a cool month, with an average temperature varying between 54.9°F (12.7°C) and 38.1°F (3.4°C). The shift into March is marked by a rise in the average high-temperature, moving from February's frosty 43°F (6.1°C) to a fresh 54.9°F (12.7°C). Weather in March »Weather in April
April is an enjoyable spring month in Eureka, Missouri, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 47.8°F (8.8°C). Eureka's weather in April shows a rise in the average high-temperature, moving up from March's fresh 54.9°F (12.7°C) to a refreshing 65.8°F (18.8°C). Weather in April »Weather in May
The last month of the spring, May, is a warm month in Eureka, Missouri, with an average temperature fluctuating between 75.7°F (24.3°C) and 57.4°F (14.1°C). With the onset of May, Eureka sees a temperature rise, with the average high-temperature moving from April's comfortable 65.8°F (18.8°C) to a moderately hot 75.7°F (24.3°C). Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Eureka, Missouri, with an average temperature fluctuating between 66.4°F (19.1°C) and 85.3°F (29.6°C). With the onset of June, the average high-temperature slightly shifts from May's moderately hot 75.7°F (24.3°C) to a still warm 85.3°F (29.6°C). Weather in June »Weather in July
July is a tropical summer month in Eureka, Missouri, with an average temperature varying between 88.2°F (31.2°C) and 69.3°F (20.7°C). In Eureka, Missouri, the month of July registers the highest temperatures, averaging 88.2°F (31.2°C) at the peak and 69.3°F (20.7°C) at the lowest. During July, the heat index is calculated to be a blisteringly hot 104°F (40°C). Weather in July »Weather in August
August, the last month of the summer in Eureka, is another tropical month, with an average temperature ranging between min 67.3°F (19.6°C) and max 86.5°F (30.3°C). Eureka measures an average high-temperature of a still tropical 86.5°F (30.3°C) in August, nearly consistent with the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Eureka, is also a moderately hot month, with an average temperature varying between 80.1°F (26.7°C) and 59.9°F (15.5°C). With the arrival of September, Eureka notices a mild change in the average high-temperature, sliding from August's hot 86.5°F (30.3°C) to a warm 80.1°F (26.7°C). Weather in September »Weather in October
October, like September, in Eureka, Missouri, is another comfortable autumn month, with an average temperature varying between 48.9°F (9.4°C) and 66.6°F (19.2°C). October's arrival comes with a decrease in the average high-temperature, moving from a moderately hot 80.1°F (26.7°C) in September to a refreshing 66.6°F (19.2°C). Weather in October »Weather in November
The last month of the autumn, November, is another cool month in Eureka, Missouri, with an average temperature varying between 37.9°F (3.3°C) and 53.8°F (12.1°C). November comes with a drop in the average high-temperature, falling from October's refreshing 66.6°F (19.2°C) to a fresh 53.8°F (12.1°C). Weather in November »Weather in December
December, the first month of the winter in Eureka, is also a frosty month, with an average temperature fluctuating between 43.3°F (6.3°C) and 30.2°F (-1°C). December suggests a modest reduction in the average high-temperature, shifting from a cool 53.8°F (12.1°C) in November to a frosty 43.3°F (6.3°C). Weather in December »Updated: Aug 8, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The month of January, characterized by an average high of 38.5°F (3.6°C) and a low of 24.6°F (-4.1°C), is recognized as the coldest.
In Eureka, during the entire year, the rain falls for 134.1 days and collects up to 23.82" (605mm) of precipitation.
January through March, November and December are months with snowfall in Eureka.
In Eureka, during the entire year, snow falls for 19.5 days and aggregates up to 4.29" (109mm) of snow.
With an average of 4.6h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2.
The month with the least rainfall is February, when the rain falls for 6.7 days and typically collects 1.1" (28mm) of precipitation.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
April through October are months without snowfall.
May is the most humid month, with an average relative humidity of 78%.
The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 3.03" (77mm) of precipitation.
With an average of 14h and 48min of daylight, June has the longest days of the year.
July stands out as Eureka's warmest month, with an average high-temperature of 88.2°F (31.2°C) and a low-temperature of 69.3°F (20.7°C).
With an average of 10.4h of sunshine, July has the most sunshine of the year.
The month with the highest UV index is July, with an average maximum UV index of 7.
October is the least humid month, with an average relative humidity of 71%.
The month with the most snowfall is December, when snow falls for 4.1 days and typically aggregates up to 1.3" (33mm) of snow.
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Eureka, MO
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (38.5°F).
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure
Eureka, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Eureka, MO
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.5mph - Average wind speed in May:
6.9mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
7.2mph - Average wind speed in November:
7.9mph - Average wind speed in December:
8.1mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Eureka, MO
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Eureka, MO
- Average rainfall in January:
1.26" - Average rainfall in February:
1.1" - Average rainfall in March:
1.65" - Average rainfall in April:
2.6" - Average rainfall in May:
3.03" - Average rainfall in June:
2.56"
- Average rainfall in July:
2.4" - Average rainfall in August:
2.68" - Average rainfall in September:
1.73" - Average rainfall in October:
2.13" - Average rainfall in November:
1.26" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days
Eureka, MO
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
6.7 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
16.3 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
6.1 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is December (6.1 days).
Average snowfall
Eureka, MO
The month with the highest snowfall is December (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Eureka, MO
- Average snowfall days in January:
6.4 days - Average snowfall days in February:
5.3 days - Average snowfall days in March:
2 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
4.1 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Eureka, MO
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 36min - Average sunshine in February:
4h and 42min - Average sunshine in March:
6h and 24min - Average sunshine in April:
8h and 24min - Average sunshine in May:
9h and 24min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 6min - Average sunshine in September:
9h and 24min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 48min
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 36min).
Average sunshine days
Eureka, MO
- Average sunshine days in January:
20.1 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
15.9 days - Average sunshine days in April:
15.6 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
13 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
16.9 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
19.8 days - Average sunshine days in December:
20.3 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is May (12.6 days).
Average UV index
Eureka, MO
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Eureka, MO
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility
Eureka, MO
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).
