Climate and monthly weather forecastLyons, SD
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Lyons, South Dakota, with an average temperature fluctuating between 22.8°F (-5.1°C) and 9.3°F (-12.6°C). In Lyons, the lowest average temperatures are observed in January, with a high of 22.8°F (-5.1°C) and a low of 9.3°F (-12.6°C). Weather in January »Weather in February
The last month of the winter, February, is also a subzero cold month in Lyons, South Dakota, with an average temperature fluctuating between 26.6°F (-3°C) and 13.1°F (-10.5°C). Lyons's average high-temperature in February sits at a still subzero cold 26.6°F (-3°C), showing little difference from the previous month. Weather in February »Weather in March
March, the first month of the spring in Lyons, is a frosty month, with an average temperature fluctuating between 27.7°F (-2.4°C) and 42.8°F (6°C). Lyons's March weather is marked by a distinct rise in high-temperatures, escalating from a subzero cold 26.6°F (-3°C) in February to a frosty 42.8°F (6°C). Weather in March »Weather in April
April is a mild spring month in Lyons, South Dakota, with an average temperature fluctuating between 38.5°F (3.6°C) and 55.4°F (13°C). With the onset of April, Lyons's weather sees a temperature rise, transitioning from a frosty 42.8°F (6°C) in March to a mild 55.4°F (13°C). Weather in April »Weather in May
The last month of the spring, May, is an enjoyable month in Lyons, South Dakota, with temperature in the range of an average high of 67.3°F (19.6°C) and an average low of 50°F (10°C). The onset of May brings a temperature shift, with the average high-temperature moving from a mild 55.4°F (13°C) in April to a comfortable 67.3°F (19.6°C). Weather in May »Weather in June
June, the first month of the summer in Lyons, is a warm month, with an average temperature fluctuating between 60.1°F (15.6°C) and 77.5°F (25.3°C). A shift in the average high-temperature is noticeable in June, changing from an enjoyable 67.3°F (19.6°C) in May to a moderately hot 77.5°F (25.3°C). Weather in June »Weather in July
July, like June, in Lyons, South Dakota, is another warm summer month, with temperature in the range of an average low of 63.1°F (17.3°C) and an average high of 82.6°F (28.1°C). July, with an average high of 82.6°F (28.1°C) and a low of 63.1°F (17.3°C), signifies the warmest month of the year. During July, the heat index is estimated at a tropical 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Lyons, South Dakota, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 81.1°F (27.3°C). The arrival of August coincides with an average high-temperature of a still warm 81.1°F (27.3°C), indicating a minimal shift from July's 82.6°F (28.1°C). Weather in August »Weather in September
September, the first month of the autumn in Lyons, is still a warm month, with an average temperature varying between 53.4°F (11.9°C) and 74.3°F (23.5°C). As September begins, there is a minor decrease in the average high-temperature, softly falling from 81.1°F (27.3°C) in August to a still moderately hot 74.3°F (23.5°C). Weather in September »Weather in October
October, the same as September, in Lyons, South Dakota, is another mild autumn month, with an average temperature fluctuating between 41.2°F (5.1°C) and 57.2°F (14°C). Lyons's October weather is marked by a distinct drop in high-temperatures, declining from a moderately hot 74.3°F (23.5°C) in September to a refreshing 57.2°F (14°C). Weather in October »Weather in November
November, the last month of the autumn in Lyons, is another chilly month, with an average temperature varying between 43°F (6.1°C) and 29.1°F (-1.6°C). November brings a minor decrease, with the average high-temperature reducing from a moderate 57.2°F (14°C) in October to a chilly 43°F (6.1°C). Weather in November »Weather in December
The first month of the winter, December, is also a subzero cold month in Lyons, South Dakota, with an average temperature ranging between min 15.4°F (-9.2°C) and max 27.5°F (-2.5°C). December marks a distinct drop in the average high-temperature, descending from November's chilly 43°F (6.1°C) to a subzero cold 27.5°F (-2.5°C). Weather in December »Updated: Feb 14, 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
January, with its high-temperature average of 22.8°F (-5.1°C) and a low-temperature average of 9.3°F (-12.6°C), is the coldest month in Lyons, South Dakota.
With an average relative humidity of 88%, January is the most humid month in Lyons.
Throughout the year, there are 118.3 rainfall days, and 22.76" (578mm) of precipitation is accumulated.
Months with snowfall in Lyons, South Dakota, are January through May, October through December.
Throughout the year, there are 45.4 snowfall days, and 19.33" (491mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 4h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
February is the month with the least rainfall in Lyons, South Dakota. Rain falls for 2.6 days and accumulates 0.63" (16mm) 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.
The month with the most rainfall in Lyons, South Dakota, is June, when the rain falls for 18.3 days and typically aggregates up to 3.62" (92mm) of precipitation.
In Lyons, South Dakota, snow does not fall in June through September.
The month with the longest days in Lyons, South Dakota, is June, with an average of 15h and 24min of daylight.
The months with the highest UV index in Lyons are June and July, with an average maximum UV index of 6.
Temperature readings in Lyons reach their annual highs in July, averaging 82.6°F (28.1°C) and a minimum average of 63.1°F (17.3°C).
The month with the most sunshine in Lyons is July, with an average of 10.7h of sunshine.
October is the least humid month, with an average relative humidity of 67%.
December is the month with the most snowfall in Lyons. Snow falls for 10.1 days and accumulates 4.21" (107mm) of snow.
The month with the shortest days in Lyons is December, with an average of 9h and 0min of daylight.
Average temperature
Lyons, SD
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (22.8°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure
Lyons, SD
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.13"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Lyons, SD
- Average wind speed in January:
10.6mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.9mph - Average wind speed in April:
11.4mph - Average wind speed in May:
9.9mph - Average wind speed in June:
9.1mph
- Average wind speed in July:
8.1mph - Average wind speed in August:
8.3mph - Average wind speed in September:
9.5mph - Average wind speed in October:
10.7mph - Average wind speed in November:
10.5mph - Average wind speed in December:
10.3mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity
Lyons, SD
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (67%).
Average rainfall
Lyons, SD
- Average rainfall in January:
0.67" - Average rainfall in February:
0.63" - Average rainfall in March:
1.38" - Average rainfall in April:
2.36" - Average rainfall in May:
3.19" - Average rainfall in June:
3.62"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.48" - Average rainfall in September:
2.05" - Average rainfall in October:
1.77" - Average rainfall in November:
0.67" - Average rainfall in December:
1.06"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days
Lyons, SD
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.6 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
12.8 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
18.3 days
- Average rainfall days in July:
14.4 days - Average rainfall days in August:
13.9 days - Average rainfall days in September:
11.7 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
4.5 days - Average rainfall days in December:
3.5 days
The month with the highest number of rainy days is June (18.3 days).
The month with the least rainy days is February (2.6 days).
Average snowfall
Lyons, SD
The month with the highest snowfall is December (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Lyons, SD
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
8.9 days - Average snowfall days in March:
6.9 days - Average snowfall days in April:
2.5 days - Average snowfall days in May:
0.2 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 days - Average snowfall days in October:
1.6 days - Average snowfall days in November:
4.4 days - Average snowfall days in December:
10.1 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Lyons, SD
- Average daylight in January:
9h and 24min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 42min - Average daylight in June:
15h and 24min
- Average daylight in July:
15h and 6min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
5h and 6min - Average sunshine in March:
6h and 0min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
9h and 54min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 6min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Lyons, SD
- Average sunshine days in January:
19.6 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
16.4 days - Average sunshine days in April:
13.6 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
9.2 days
- Average sunshine days in July:
13.3 days - Average sunshine days in August:
13 days - Average sunshine days in September:
16.8 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
21.5 days - Average sunshine days in December:
20.2 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (9.2 days).
Average UV index
Lyons, SD
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Lyons, SD
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility
Lyons, SD
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
