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St. John MO Weather - Mostly Clear - 71°F
Mostly Clear
71°F
Updated 4:56 am
Feels Like 76°F
Humidity 90%
Wind N 0 mph
Barometer  29.86 in
Dew Point 68°F
St. John MO Weather - Mostly Clear - 22°C
Mostly Clear
22°C
Updated 4:56 am
Feels Like 25°C
Humidity 90%
Wind N 0 km/h
Barometer  101.1 kPa
Dew Point 20°C
St. John, MO Weather and Current Conditionsst. john mo weather forecast

St. John, MO Weather Forecast

St. John Missouri WeatherSt. John, Missouri Weather Weather Forecast
14 Day API St. John, MO Weather Forecast. Note: Our 7 day St. John, Missouri weather forecast is our most reliable, and specific forecast. This model should only be used as a probable scenario. Forecasting more than 7 days ahead is challenging.
St. John, MO Weather Forecast Dated: 456 AM Sat Sep 12 2026
Expect a very warm period with plenty of sunshine and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.

Saturday, September 12, 2026

Mid-Morning
St. John Weather - 2026-09-12 - Morning - Sunny
76°F 25°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-12 - Afternoon - Sunny
93°F 34°C
Sunny
Early-Evening
St. John Weather - 2026-09-12 - Evening - Sunny
88°F 31°C
Sunny
Very hot with temperatures reaching 93°F 34°C, sunny throughout the day, with lower humidity and steady pressure.

Sunday, September 13, 2026

Mid-Morning
St. John Weather - 2026-09-13 - Morning - Overcast
76°F 24°C
Overcast
Mid-Afternoon
St. John Weather - 2026-09-13 - Afternoon - Overcast
92°F 33°C
Overcast
Early-Evening
St. John Weather - 2026-09-13 - Evening - Overcast
81°F 28°C
Overcast
Hot and sweltering around 92°F 33°C, overcast through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds turning from the WNW to the NE at 12 mph 19 km/h.

Monday, September 14, 2026

Mid-Morning
St. John Weather - 2026-09-14 - Morning - Light Showers
64°F 18°C
Light Showers
Mid-Afternoon
St. John Weather - 2026-09-14 - Afternoon - Overcast
82°F 28°C
Overcast
Early-Evening
St. John Weather - 2026-09-14 - Evening - Sunny
83°F 29°C
Sunny
Quite warm around 82°F 28°C, morning showers, giving way to clearing skies, with lower humidity and barometric pressure falling. Winds switching from the E to the ESE at 7 mph 11 km/h.

Tuesday, September 15, 2026

Mid-Morning
St. John Weather - 2026-09-15 - Morning - Sunny
85°F 29°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-15 - Afternoon - Sunny
93°F 34°C
Sunny
Early-Evening
St. John Weather - 2026-09-15 - Evening - Sunny
89°F 31°C
Sunny
Hot temperatures near 93°F 34°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds moving from the SSW to the ENE at 5 mph 8 km/h.

Wednesday, September 16, 2026

Mid-Morning
St. John Weather - 2026-09-16 - Morning - Sunny
87°F 30°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-16 - Afternoon - Sunny
99°F 37°C
Sunny
Early-Evening
St. John Weather - 2026-09-16 - Evening - Sunny
88°F 31°C
Sunny
Very hot with a high of 99°F 37°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure.

Thursday, September 17, 2026

Mid-Morning
St. John Weather - 2026-09-17 - Morning - Sunny
86°F 30°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-17 - Afternoon - Sunny
98°F 37°C
Sunny
Early-Evening
St. John Weather - 2026-09-17 - Evening - Overcast
92°F 34°C
Overcast
Very hot with temperatures reaching 98°F 37°C, sunny in the morning, becoming cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds swinging from the SW to the SSW at 6 mph 10 km/h.

Friday, September 18, 2026

Mid-Morning
St. John Weather - 2026-09-18 - Morning - Scattered Showers
81°F 27°C
Scattered Showers
Mid-Afternoon
St. John Weather - 2026-09-18 - Afternoon - Scattered Showers
94°F 35°C
Scattered Showers
Early-Evening
St. John Weather - 2026-09-18 - Evening - Light Showers
79°F 26°C
Light Showers
Hot and sweltering around 94°F 35°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds shifting from the SW to the WSW at 6 mph 10 km/h.

Saturday, September 19, 2026

Mid-Morning
St. John Weather - 2026-09-19 - Morning - Scattered Showers
66°F 19°C
Scattered Showers
Mid-Afternoon
St. John Weather - 2026-09-19 - Afternoon - Sunny
73°F 23°C
Sunny
Early-Evening
St. John Weather - 2026-09-19 - Evening - Scattered Showers
68°F 20°C
Scattered Showers
Enjoyable around 73°F 23°C, scattered downpours possible, with lower humidity and steady pressure. Winds turning from the NW to the ESE at 13 mph 20 km/h.

Sunday, September 20, 2026

Mid-Morning
St. John Weather - 2026-09-20 - Morning - Overcast
62°F 17°C
Overcast
Mid-Afternoon
St. John Weather - 2026-09-20 - Afternoon - Scattered Showers
73°F 23°C
Scattered Showers
Early-Evening
St. John Weather - 2026-09-20 - Evening - Cloudy
69°F 21°C
Cloudy
Mild temperatures up to 73°F 23°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds switching from the NNE to the NE at 10 mph 16 km/h. Gusts up to 21 mph 34 km/h.

Monday, September 21, 2026

Mid-Morning
St. John Weather - 2026-09-21 - Morning - Sunny
62°F 17°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-21 - Afternoon - Sunny
75°F 24°C
Sunny
Early-Evening
St. John Weather - 2026-09-21 - Evening - Sunny
70°F 21°C
Sunny
Mild with a high of 75°F 24°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and barometric pressure falling.

Tuesday, September 22, 2026

Mid-Morning
St. John Weather - 2026-09-22 - Morning - Sunny
65°F 19°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-22 - Afternoon - Sunny
80°F 27°C
Sunny
Early-Evening
St. John Weather - 2026-09-22 - Evening - Sunny
77°F 25°C
Sunny
Warm and summery near 80°F 27°C, sunny throughout the day, with lower humidity and barometric pressure falling.

Wednesday, September 23, 2026

Mid-Morning
St. John Weather - 2026-09-23 - Morning - Partly Cloudy
74°F 23°C
Partly Cloudy
Mid-Afternoon
St. John Weather - 2026-09-23 - Afternoon - Sunny
88°F 31°C
Sunny
Early-Evening
St. John Weather - 2026-09-23 - Evening - Sunny
79°F 26°C
Sunny
Balmy with temperatures reaching 88°F 31°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the SW to the N at 10 mph 16 km/h. Gusts up to 22 mph 35 km/h.

Thursday, September 24, 2026

Mid-Morning
St. John Weather - 2026-09-24 - Morning - Sunny
62°F 17°C
Sunny
Mid-Afternoon
St. John Weather - 2026-09-24 - Afternoon - Sunny
78°F 25°C
Sunny
Early-Evening
St. John Weather - 2026-09-24 - Evening - Sunny
74°F 24°C
Sunny
Enjoyable around 78°F 25°C, sunny throughout the day, with lower humidity and steady pressure.

Friday, September 25, 2026

Mid-Morning
St. John Weather - 2026-09-25 - Morning - Partly Cloudy
71°F 22°C
Partly Cloudy
Mid-Afternoon
St. John Weather - 2026-09-25 - Afternoon - Partly Cloudy
96°F 35°C
Partly Cloudy
Early-Evening
St. John Weather - 2026-09-25 - Evening - Sunny
92°F 33°C
Sunny
Hot temperatures near 96°F 35°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and barometric pressure falling. Winds swinging from the S to the SSW at 13 mph 20 km/h. Gusts up to 30 mph 48 km/h.

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Weather by the Numbers

Sat, 12th
St. John MO Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 93°F 34°C
Lo: 70°F 21°C
Sunrise 06:40 AM
Sunset 07:14 PM
Wind W 4 mph7 km/h
Dew Point 62°F17°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 46%
Sun, 13th
St. John MO Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 92°F 33°C
Lo: 70°F 21°C
Sunrise 06:41 AM
Sunset 07:13 PM
Wind WNW 2 mph3 km/h
Dew Point 61°F16°C
uv Index 7
Barometric Pressure 30 in1016 mb
POP 10% *
Humidity 43%
Mon, 14th
St. John MO Weather - Monday, Sep 14, 2026 - Overcast
Hi: 86°F 30°C
Lo: 61°F 16°C
Sunrise 06:42 AM
Sunset 07:11 PM
Wind E 7 mph12 km/h
Dew Point 57°F14°C
uv Index 7
Barometric Pressure 30.15 in1021 mb
POP 15% *
Humidity 63%
Tue, 15th
St. John MO Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 98°F 37°C
Lo: 79°F 26°C
Sunrise 06:43 AM
Sunset 07:10 PM
Wind SW 11 mph17 km/h
Dew Point 62°F17°C
uv Index 9
Barometric Pressure 30 in1016 mb
POP 1% *
Humidity 34%
Wed, 16th
St. John MO Weather - Wednesday, Sep 16, 2026 - Patchy Rain Nearby
Hi: 100°F 38°C
Lo: 79°F 26°C
Sunrise 06:44 AM
Sunset 07:08 PM
Wind SW 8 mph13 km/h
Dew Point 61°F16°C
uv Index 8
Barometric Pressure 30.09 in1019 mb
POP 17% *
Humidity 32%
Thu, 17th
St. John MO Weather - Thursday, Sep 17, 2026 - Partly Cloudy
Hi: 99°F 37°C
Lo: 82°F 28°C
Sunrise 06:45 AM
Sunset 07:06 PM
Wind SW 9 mph15 km/h
Dew Point 60°F16°C
uv Index 9
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 32%
Fri, 18th
St. John MO Weather - Friday, Sep 18, 2026 - Sunny
Hi: 94°F 35°C
Lo: 74°F 23°C
Sunrise 06:46 AM
Sunset 07:05 PM
Wind WSW 8 mph13 km/h
Dew Point 63°F17°C
uv Index 8
Barometric Pressure 30 in1016 mb
POP 17% *
Humidity 43%
Sat, 19th
St. John MO Weather - Saturday, Sep 19, 2026 - Patchy Rain Nearby
Hi: 75°F 24°C
Lo: 64°F 18°C
Sunrise 06:46 AM
Sunset 07:03 PM
Wind NW 10 mph15 km/h
Dew Point 57°F14°C
uv Index 5
Barometric Pressure 29.97 in1015 mb
POP 7% *
Humidity 59%
Sun, 20th
St. John MO Weather - Sunday, Sep 20, 2026 - Overcast
Hi: 73°F 23°C
Lo: 59°F 15°C
Sunrise 06:47 AM
Sunset 07:02 PM
Wind NE 11 mph17 km/h
Dew Point 51°F11°C
uv Index 5
Barometric Pressure 30.09 in1019 mb
POP 10% *
Humidity 53%
Mon, 21st
St. John MO Weather - Monday, Sep 21, 2026 - Sunny
Hi: 76°F 24°C
Lo: 56°F 13°C
Sunrise 06:48 AM
Sunset 07:00 PM
Wind NE 8 mph12 km/h
Dew Point 42°F6°C
uv Index 6
Barometric Pressure 30.09 in1019 mb
POP 1% *
Humidity 36%
Tue, 22nd
St. John MO Weather - Tuesday, Sep 22, 2026 - Sunny
Hi: 81°F 27°C
Lo: 59°F 15°C
Sunrise 06:49 AM
Sunset 06:58 PM
Wind SW 5 mph8 km/h
Dew Point 40°F5°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 0% *
Humidity 29%
Wed, 23rd
St. John MO Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 89°F 32°C
Lo: 68°F 20°C
Sunrise 06:50 AM
Sunset 06:57 PM
Wind W 7 mph11 km/h
Dew Point 48°F9°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 30%
Thu, 24th
St. John MO Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 79°F 26°C
Lo: 56°F 13°C
Sunrise 06:51 AM
Sunset 06:55 PM
Wind NE 6 mph9 km/h
Dew Point 33°F0°C
uv Index 6
Barometric Pressure 30.18 in1022 mb
POP 0% *
Humidity 25%
Fri, 25th
St. John MO Weather - Friday, Sep 25, 2026 - Overcast
Hi: 98°F 37°C
Lo: 64°F 18°C
Sunrise 06:52 AM
Sunset 06:53 PM
Wind SSW 12 mph19 km/h
Dew Point 48°F9°C
uv Index 6
Barometric Pressure 29.97 in1015 mb
POP 6% *
Humidity 28%
* POP = Probability of Precipitation. Data for 12:00 PM.