Weather in Alton, Missouri
Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →
Alton, MO
Sunday, May 17 at 1:45 AM
75
°
Clear
Feels like
76°
Humidity
69%
Wind
9 mph
Sunrise
5:57 AM
Sunset
8:06 PM
Alton, MO
Hour by hour · 24h
68°
8p
65°
9p
63°
10p
62°
11p
61°
12a
60°
1a
59°
2a
58°
3a
57°
4a
58°
5a
58°
6a
60°
7a
64°
8a
68°
9a
71°
10a
74°
11a
76°
12p
79°
1p
80°
2p
81°
3p
80°
4p
81°
11%
5p
78°
6p
76°
7p
Alton, MO
7-day forecast
- TodayMay 16Overcast25%85°73°
- SundayMay 17Partly Cloudy—87°65°
- MondayMay 18Light Drizzle27%82°73°
- TuesdayMay 19Thunderstorm68%84°62°
- WednesdayMay 20Drizzle71%66°57°
- ThursdayMay 21Rain27%62°57°
- FridayMay 22Heavy Drizzle28%71°59°
Alton, MO
Next 24 hours · Mild now
Alton, MO
Anemometer · 24h winds · from true
From · True
SSE
156° · backing 18°
Direction
SSE
156°
Sustained
9
mph
Gust
17
mph
Peak 24h
35
avg 11
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
−24h−18h−12h−6hnow
Alton, MO
Air quality
57
AQI
Moderate
- PM 2.5
- 4.8 μg/m³
- PM 10
- 6.1 μg/m³
- NO₂
- 0.9 μg/m³
- Ozone
- 112.0 μg/m³
- UV Index
- 0.0 Low
Alton, MO
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:29 AM
Sunrise
5:57 AM
Daylight
14h 09m
Sunset
8:06 PM
Civil dusk
1:36 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Alton, MO
The moon
New Moon
0% illuminated
- Moonrise
- 11:07 AM
- Moonset
- 1:33 AM
- In sign
- ♉︎ Taurus
Alton, MO
Microseason · 28 of 72
May 16–20
Roses open on the Piedmont edge
insect
Alton at a glance
- Today vs. normal: 75°F — typical for the season
- Last frost: March 27 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Warm-season window is open
As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.