Weather StoryAlmanac, microseasons, and the day's weather story.

Weather in Union, Missouri

Roses open on the Piedmont edge. Day 59 of spring. Read this microseason across nine climate regions →

Union, MO
Sunday, May 17 at 4:56 AM
73
°
Mostly Clear
Feels like
77°
Humidity
80%
Wind
4 mph
Sunrise
5:51 AM
Sunset
8:09 PM
Union, MO
Hour by hour · 24h
65°
11p
64°
12a
63°
1a
61°
2a
61°
3a
61°
4a
61°
5a
62°
6a
64°
10%
7a
67°
8a
68°
9a
71°
10a
76°
11a
78°
12p
79°
1p
81°
2p
80°
3p
79°
4p
81°
5p
80°
6p
80°
7p
78°
8p
76°
9p
77°
10p
L 61°H 81°
Union, MO
7-day forecast
  1. Today
    May 16
    Thunderstorm
    60%
    80°71°
  2. Sunday
    May 17
    Overcast
    88°68°
  3. Monday
    May 18
    Rain
    45%
    79°66°
  4. Tuesday
    May 19
    Light Showers
    85%
    81°59°
  5. Wednesday
    May 20
    Overcast
    63%
    68°49°
  6. Thursday
    May 21
    Heavy Drizzle
    11%
    61°54°
  7. Friday
    May 22
    Light Drizzle
    23%
    64°55°
Union, MO
Anemometer · 24h winds · from true
NESW
From · True
SE
146° · backing 51°
Direction
SE
146°
Sustained
4
mph
Gust
14
mph
Peak 24h
27
avg 7
Beaufort · 2 · LIGHT 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
avg 7 · pk 27 @ 7:00p
−24h−18h−12h−6hnow
Light breeze backing 51° from the se.
Union, MO
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
992.1
+1.4 mb in 3h · rising · 29.30 inHg
Now
992.1
mb
3h
+1.4
mb
12h
-1.5
mb
24h
+1.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 991995
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Union, MO
Air quality
31
AQI
Good
PM 2.5
5.5 μg/m³
PM 10
6.1 μg/m³
NO₂
4.0 μg/m³
Ozone
68.0 μg/m³
UV Index
0.0 Low
Union, MO
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:23 AM
Sunrise
5:51 AM
Daylight
14h 18m
Sunset
8:09 PM
Civil dusk
1:40 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Union, MO
The moon
New Moon
0% illuminated
Moonrise
10:58 AM
Moonset
1:37 AM
In sign
♊︎ Gemini
Union, MO
Microseason · 28 of 72
May 16–20

Roses open on the Piedmont edge

insect
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Union at a glance

  • Today vs. normal: 73°F — typical for the season
  • Last frost: April 7 (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.

ZIP codes in Union

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.