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

Weather in Cromwell, Iowa

Roses Bloom Along the Shelter Rows. Day 59 of spring. Read this microseason across nine climate regions →

Cromwell, IA
Sunday, May 17 at 1:02 AM
64
°
Overcast
Feels like
57°
Humidity
80%
Wind
21 mph
Sunrise
5:58 AM
Sunset
8:29 PM
Cromwell, IA
Hour by hour · 24h
72°
8p
70°
9p
68°
10p
68°
11p
65°
12a
64°
1a
62°
2a
63°
3a
61°
4a
60°
5a
58°
6a
59°
7a
64°
8a
69°
9a
73°
10a
77°
11a
80°
12p
83°
1p
84°
2p
85°
3p
86°
4p
85°
5p
87°
6p
85°
7p
L 58°H 87°
Cromwell, IA
7-day forecast
  1. Today
    May 16
    Thunderstorm
    69%
    84°63°
  2. Sunday
    May 17
    Thunderstorm
    77%
    79°62°
  3. Monday
    May 18
    Thunderstorm
    89%
    81°61°
  4. Tuesday
    May 19
    Showers
    89%
    61°47°
  5. Wednesday
    May 20
    Overcast
    —
    59°41°
  6. Thursday
    May 21
    Light Drizzle
    —
    64°45°
  7. Friday
    May 22
    Overcast
    14%
    66°54°
Cromwell, IA
Next 24 hours · Mild now
HOT 90°50°73°95°12a6a12p6pnow 72°high 87°low 58°
Cromwell, IA
Anemometer · 24h winds · from true
NESW
From · True
E
094° · veering 32°
Direction
E
094°
Sustained
21
mph
Gust
33
mph
Peak 24h
40
avg 11
Beaufort · 5 · FRESH 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 11 · pk 40 @ 10:00p
−24h−18h−12h−6hnow
Sustained 21 mph with gusts pulsing to 33 — flags snap, branches bend.
Cromwell, IA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
961.5
+1.1 mb in 3h · rising rapidly · 28.39 inHg
Now
961.5
mb
3h
+1.1
mb
12h
-1.6
mb
24h
+0.3
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 959–965
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Cromwell, IA
Air quality
47
AQI
Good
PM 2.5
4.8 μg/m³
PM 10
5.6 μg/m³
NO₂
2.0 μg/m³
Ozone
89.0 μg/m³
UV Index
0.0 Low
Cromwell, IA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:29 AM
Sunrise
5:58 AM
Daylight
14h 31m
Sunset
8:29 PM
Civil dusk
2:02 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Cromwell, IA
The moon
New Moon
0% illuminated
Moonrise
11:03 AM
Moonset
2:02 AM
In sign
♉︎ Taurus
Cromwell, IA
Microseason · 28 of 72
May 16–20

Roses Bloom Along the Shelter Rows

plant
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Cromwell at a glance

  • Today vs. normal: 7°F below the seasonal normal for this latitude
  • Last frost: April 22 (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.

All cities in Iowa →

ZIP codes in Cromwell

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.