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

Weather in Altoona, Iowa

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

Altoona, IA
Sunday, May 17 at 12:47 AM
75
°
Overcast
Feels like
76°
Humidity
70%
Wind
9 mph
Sunrise
5:53 AM
Sunset
8:27 PM
Altoona, IA
Hour by hour · 24h
73°
7p
70°
8p
69°
9p
68°
10p
67°
11p
66°
12a
64°
1a
62°
2a
61°
3a
60°
4a
57°
5a
56°
6a
58°
7a
62°
8a
66°
9a
72°
10a
75°
11a
78°
12p
81°
1p
84°
2p
86°
3p
87°
4p
85°
5p
83°
6p
L 56°H 87°
Altoona, IA
7-day forecast
  1. Today
    May 16
    Thunderstorm
    51%
    82°58°
  2. Sunday
    May 17
    Thunderstorm
    58%
    79°61°
  3. Monday
    May 18
    Thunderstorm
    87%
    83°62°
  4. Tuesday
    May 19
    Light Rain
    87%
    63°47°
  5. Wednesday
    May 20
    Overcast
    61°41°
  6. Thursday
    May 21
    Overcast
    65°45°
  7. Friday
    May 22
    Light Drizzle
    66°54°
Altoona, IA
Anemometer · 24h winds · from true
NESW
From · True
SE
135° · backing 166°
Direction
SE
135°
Sustained
9
mph
Gust
24
mph
Peak 24h
35
avg 8
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
avg 8 · pk 35 @ 9:00p
−24h−18h−12h−6hnow
Light breeze backing 166° from the se.
Altoona, IA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
973.6
+0.8 mb in 3h · rising rapidly · 28.75 inHg
Now
973.6
mb
3h
+0.8
mb
12h
-2.7
mb
24h
+0.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 972976
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Altoona, IA
Air quality
60
AQI
Moderate
PM 2.5
4.8 μg/m³
PM 10
5.8 μg/m³
NO₂
3.8 μg/m³
Ozone
96.0 μg/m³
UV Index
0.1 Low
Altoona, IA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:23 AM
Sunrise
5:53 AM
Daylight
14h 34m
Sunset
8:27 PM
Civil dusk
2:00 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Altoona, IA
The moon
New Moon
0% illuminated
Moonrise
10:56 AM
Moonset
2:01 AM
In sign
♉︎ Taurus
Altoona, 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 →

Altoona at a glance

  • Today vs. normal: 5°F above the seasonal normal for this latitude
  • Last frost: April 26 (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 Altoona

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.