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ST. LOUIS, MISSOURI
Current Conditions
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TEMPERATURE
Average Temperature | Years on Record: 50  |
 | ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| F | 56 | 30 | 35 | 44 | 57 | 66 | 75 | 79 | 78 | 70 | 59 | 45 | 35 |
Average High Temperature | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| F | 66 | 39 | 44 | 54 | 67 | 76 | 85 | 89 | 87 | 80 | 69 | 54 | 43 |
Average Low Temperature | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| F | 46 | 21 | 25 | 34 | 46 | 55 | 65 | 69 | 67 | 59 | 48 | 36 | 26 |
Highest Recorded Temperature | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| F | 115 | 77 | 83 | 89 | 93 | 98 | 105 | 115 | 107 | 104 | 94 | 85 | 76 |
Lowest Recorded Temperature | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| F | -18 | -18 | -10 | -5 | 22 | 31 | 43 | 51 | 47 | 36 | 23 | 1 | -16 |
Average Number of Days Above 90F/32C | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 43 | --- | --- | --- | --- | 1 | 9 | 15 | 13 | 5 | --- | --- | --- |
Average Number of Days Above 70F/21C | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 180 | --- | 1 | 5 | 13 | 24 | 29 | 31 | 31 | 26 | 16 | 4 | 1 |
Average Number of Days Below 32F/0C | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 98 | 26 | 20 | 14 | 2 | --- | --- | --- | --- | --- | 1 | 11 | 22 |
Average Number of Days Below 10F/-12C | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 12 | 6 | 3 | --- | --- | --- | --- | --- | --- | --- | --- | --- | 3 |
PRECIPITATION
Average Precipitation | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| in. | 37.1 | 2 | 2.1 | 3.3 | 3.6 | 3.9 | 3.8 | 3.8 | 3 | 3 | 2.8 | 3.1 | 2.6 |
PRECIPITATION - RAIN
Average Number of Rainy Days | Years on Record: 36 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 111 | 8 | 8 | 11 | 11 | 11 | 9 | 9 | 8 | 8 | 8 | 10 | 9 |
Average Number of Days With Thunderstorms | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 48 | 1 | 1 | 3 | 6 | 7 | 8 | 7 | 6 | 4 | 2 | 2 | 1 |
Most Rain Reported in a Month | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| in. | 55 | 8 | 5 | 6.7 | 10.3 | 12.9 | 10.5 | 12.7 | 14.8 | 10 | 7.1 | 9.9 | 7.8 |
Least Recorded Rainfall | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| in. | 20.6 | 0.1 | 0.3 | 0.8 | 1 | 1 | 0.4 | 0.6 | 0.1 | --- | 0.2 | 0.1 | --- |
PRECIPITATION - SNOW
Average Snowfall | Years on Record: 57 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| in. | 19.8 | 5.3 | 4.7 | 4.2 | 0.4 | --- | --- | --- | --- | --- | --- | 1.4 | 3.8 |
HUMIDITY
Average Morning Relative Humidity | Years on Record: 51 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| % | 82 | 80 | 80 | 80 | 77 | 81 | 82 | 83 | 86 | 86 | 82 | 80 | 81 |
Average Evening Relative Humidity | Years on Record: 51 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| % | 54 | 62 | 58 | 54 | 49 | 51 | 51 | 51 | 51 | 50 | 50 | 56 | 63 |
Average Dew Point | Years on Record: 51 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| F | 44 | 22 | 25 | 33 | 42 | 53 | 62 | 66 | 65 | 57 | 46 | 35 | 26 |
DEGREE DAYS
Heating Degree Days | Years on Record: 30 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 4758 | 1107 | 871 | 617 | 266 | 111 | --- | --- | --- | 21 | 237 | 564 | 964 |
Cooling Degree Days | Years on Record: 30 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 1534 | --- | --- | --- | 17 | 145 | 312 | 459 | 391 | 177 | 33 | --- | --- |
Growing Degree Days | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 4102 | --- | --- | --- | 210 | 496 | 750 | 899 | 868 | 600 | 279 | --- | --- |
VISIBILITY
Average Number of Days With Fog | Years on Record: 50 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 143 | 13 | 13 | 13 | 11 | 11 | 9 | 9 | 13 | 13 | 12 | 12 | 14 |
Average Number of Clear Days | Years on Record: 45 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 101 | 7 | 7 | 7 | 7 | 7 | 7 | 9 | 10 | 12 | 12 | 9 | 7 |
Average Possibility of Sunshine | Years on Record: 34 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| % | 57 | 51 | 52 | 53 | 56 | 59 | 66 | 68 | 64 | 63 | 59 | 46 | 43 |
Average Number of Cloudy Days | Years on Record: 45 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 163 | 17 | 15 | 16 | 15 | 14 | 12 | 11 | 10 | 10 | 11 | 15 | 17 |
Average Number of Partly Cloudy Days | Years on Record: 45 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| Days | 101 | 7 | 6 | 8 | 8 | 10 | 11 | 11 | 11 | 8 | 8 | 6 | 7 |
WIND
Average Wind Speed | Years on Record: 51 |
| ANNUAL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ||||||||||||||
| mph | 11 | 12 | 12 | 13 | 13 | 10 | 10 | 9 | 8 | 9 | 10 | 12 | 12 |
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