Weather in Portsmouth, Iowa
Roses Bloom Along the Shelter Rows. Day 59 of spring. Read this microseason across nine climate regions →
Portsmouth, IA
Sunday, May 17 at 1:06 AM
71
°
Overcast
Feels like
68°
Humidity
75%
Wind
17 mph
Sunrise
6:01 AM
Sunset
8:35 PM
Portsmouth, IA
Hour by hour · 24h
74°
8p
71°
9p
68°
10p
66°
11p
63°
12a
61°
1a
59°
2a
59°
3a
57°
4a
56°
5a
55°
6a
55°
7a
61°
8a
67°
9a
72°
10a
76°
11a
82°
12p
85°
1p
87°
2p
89°
3p
90°
4p
90°
16%
5p
91°
13%
6p
87°
20%
7p
Portsmouth, IA
7-day forecast
- TodayMay 16Thunderstorm32%83°57°
- SundayMay 17Thunderstorm76%79°60°
- MondayMay 18Showers96%80°58°
- TuesdayMay 19Overcast96%59°46°
- WednesdayMay 20Overcast—61°42°
- ThursdayMay 21Light Drizzle—65°47°
- FridayMay 22Light Rain12%66°55°
Portsmouth, IA
Next 24 hours · Mild now
Portsmouth, IA
Anemometer · 24h winds · from true
From · True
ESE
114° · veering 82°
Direction
ESE
114°
Sustained
17
mph
Gust
31
mph
Peak 24h
45
avg 13
Beaufort · 4 · MOD 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
Portsmouth, IA
Air quality
62
AQI
Moderate
- PM 2.5
- 3.7 μg/m³
- PM 10
- 4.5 μg/m³
- NO₂
- 2.3 μg/m³
- Ozone
- 98.0 μg/m³
- UV Index
- 0.1 Low
Portsmouth, IA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:31 AM
Sunrise
6:01 AM
Daylight
14h 34m
Sunset
8:35 PM
Civil dusk
2:08 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Portsmouth, IA
The moon
New Moon
0% illuminated
- Moonrise
- 11:05 AM
- Moonset
- 2:08 AM
- In sign
- ♉︎ Taurus
Portsmouth, IA
Microseason · 28 of 72
May 16–20
Roses Bloom Along the Shelter Rows
plant
Portsmouth at a glance
- Today vs. normal: 71°F — typical for the season
- 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.