Climate and monthly weather forecastSaint James, MO
Climate and monthly weather forecast
Weather in January
January, the same as December, is a wintry winter month in Saint James, Missouri, with temperature in the range of an average low of 24.8°F (-4°C) and an average high of 39.6°F (4.2°C). Saint James's January weather, marked by an average high temperature of 39.6°F (4.2°C) and an average low temperature of 24.8°F (-4°C), is the coldest in the year. Weather in January »Weather in February
The last month of the winter, February, is a frosty month in Saint James, Missouri, with an average temperature fluctuating between 44.2°F (6.8°C) and 28.2°F (-2.1°C). Upon the beginning of February, Saint James's high-temperatures register at a chilly 44.2°F (6.8°C), closely mirroring the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Saint James, Missouri, with an average temperature fluctuating between 37.9°F (3.3°C) and 55°F (12.8°C). March's arrival brings a temperature shift, moving from a frosty 44.2°F (6.8°C) in February to a cool 55°F (12.8°C). Weather in March »Weather in April
April is an enjoyable spring month in Saint James, Missouri, with an average temperature varying between 66.2°F (19°C) and 46.9°F (8.3°C). In Saint James, the average high-temperature in April rises, from a cool 55°F (12.8°C) in March, to an enjoyable 66.2°F (19°C). Weather in April »Weather in May
May, the last month of the spring in Saint James, is a warm month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 55.9°F (13.3°C). A rise in the average high-temperature is observed during May, moving from a refreshing 66.2°F (19°C) in April to a warm 76.5°F (24.7°C). Weather in May »Weather in June
The first month of the summer, June, is a hot month in Saint James, Missouri, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 64.9°F (18.3°C). The transition to June introduces an increase in the average high-temperature, shifting from a moderately hot 76.5°F (24.7°C) in May to a tropical 86.5°F (30.3°C). Weather in June »Weather in July
July, the same as June, in Saint James, Missouri, is another tropical summer month, with an average temperature varying between 67.1°F (19.5°C) and 89.2°F (31.8°C). With average high temperatures of 89.2°F (31.8°C) and lows of 67.1°F (19.5°C), July is the warmest month. The heat index for July is appraised at a scorching 105.8°F (41°C). Weather in July »Weather in August
August, the last month of the summer in Saint James, is also a hot month, with an average temperature fluctuating between 65.7°F (18.7°C) and 87.4°F (30.8°C). August's arrival brings an average high-temperature of a still hot 87.4°F (30.8°C), demonstrating subtle variation from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Saint James, is also a moderately hot month, with an average temperature fluctuating between 58.8°F (14.9°C) and 80.6°F (27°C). Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a tropical 87.4°F (30.8°C) to a warm 80.6°F (27°C). Weather in September »Weather in October
October, the same as September, is another comfortable autumn month in Saint James, Missouri, with temperature in the range of an average low of 48°F (8.9°C) and an average high of 66.2°F (19°C). Saint James witnesses a significant decrease in the average high-temperature with the arrival of October, falling from September's moderately hot 80.6°F (27°C) to an enjoyable 66.2°F (19°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Saint James, Missouri, with temperature in the range of an average low of 37.4°F (3°C) and an average high of 53.6°F (12°C). Saint James's November weather comes with a decrease in average high-temperatures, moving from a refreshing 66.2°F (19°C) in October to a fresh 53.6°F (12°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Saint James, Missouri, with temperature in the range of an average low of 29.7°F (-1.3°C) and an average high of 43.7°F (6.5°C). In Saint James, the average high-temperature in December decreases from a fresh 53.6°F (12°C) in November to a chilly 43.7°F (6.5°C). Weather in December »Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature
Saint James, MO
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (39.6°F).
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure
Saint James, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.06"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:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.04"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
Saint James, MO
- Average wind speed in January:
8.3mph - Average wind speed in February:
8.1mph - Average wind speed in March:
8mph - Average wind speed in April:
8mph - Average wind speed in May:
6.8mph - 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:
5.6mph - Average wind speed in October:
7mph - Average wind speed in November:
7.8mph - Average wind speed in December:
7.9mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity
Saint James, MO
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (73%).
Average rainfall
Saint James, MO
- Average rainfall in January:
1.34" - Average rainfall in February:
1.3" - Average rainfall in March:
1.93" - Average rainfall in April:
3.19" - Average rainfall in May:
3.03" - Average rainfall in June:
2.6"
The wettest month (with the highest rainfall) is April (3.19").
The driest month (with the least rainfall) is February (1.3").
Average rainfall days
Saint James, MO
- Average rainfall days in January:
6.5 days - Average rainfall days in February:
7.3 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
15.3 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
15.7 days - Average rainfall days in August:
14.5 days - Average rainfall days in September:
11.4 days - Average rainfall days in October:
9.5 days - Average rainfall days in November:
8.7 days - Average rainfall days in December:
7 days
The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is January (6.5 days).
Average snowfall
Saint James, MO
The months with the highest snowfall are February and December (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Saint James, MO
- Average snowfall days in January:
7.6 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3.1 days - Average snowfall days in April:
0.5 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 days - Average snowfall days in October:
0.2 days - Average snowfall days in November:
1.6 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Saint James, MO
- Average daylight in January:
9h and 54min - 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 12min - 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 36min
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 36min).
- Average sunshine in January:
4h and 36min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 12min - Average sunshine in May:
9h and 6min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 0min - Average sunshine in September:
9h and 18min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 48min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days
Saint James, MO
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.9 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
13 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
12.6 days - Average sunshine days in August:
13.2 days - Average sunshine days in September:
16 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
19 days - Average sunshine days in December:
19 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (12.6 days).
Average UV index
Saint James, MO
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Saint James, MO
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility
Saint James, MO
The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).





