Weather in Grinnell, Iowa
Roses Bloom Along the Shelter Rows. Day 59 of spring. Read this microseason across nine climate regions →
Grinnell, IA
Sunday, May 17 at 12:53 AM
78
°
Overcast
Feels like
79°
Humidity
64%
Wind
10 mph
Sunrise
5:49 AM
Sunset
8:24 PM
Grinnell, IA
Hour by hour · 24h
74°
7p
72°
8p
70°
9p
69°
10p
66°
11p
65°
12a
63°
1a
63°
2a
62°
3a
60°
4a
57°
5a
57°
6a
58°
7a
62°
8a
66°
9a
70°
10a
74°
11a
78°
12p
82°
1p
84°
2p
85°
3p
86°
4p
86°
5p
83°
6p
Grinnell, IA
7-day forecast
- TodayMay 16Thunderstorm66%82°58°
- SundayMay 17Thunderstorm55%79°61°
- MondayMay 18Thunderstorm85%82°62°
- TuesdayMay 19Light Showers82%64°46°
- WednesdayMay 20Overcast—60°40°
- ThursdayMay 21Overcast—64°44°
- FridayMay 22Overcast—66°52°
Grinnell, IA
Next 24 hours · Mild now
Grinnell, IA
Anemometer · 24h winds · from true
From · True
SSE
154° · backing 39°
Direction
SSE
154°
Sustained
10
mph
Gust
20
mph
Peak 24h
45
avg 7
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
Grinnell, IA
Air quality
54
AQI
Moderate
- PM 2.5
- 4.0 μg/m³
- PM 10
- 5.0 μg/m³
- NO₂
- 2.5 μg/m³
- Ozone
- 94.0 μg/m³
- UV Index
- 0.1 Low
Grinnell, IA
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
10:19 AM
Sunrise
5:49 AM
Daylight
14h 35m
Sunset
8:24 PM
Civil dusk
1:57 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Grinnell, IA
The moon
New Moon
0% illuminated
- Moonrise
- 10:53 AM
- Moonset
- 1:58 AM
- In sign
- ♉︎ Taurus
Grinnell, IA
Microseason · 28 of 72
May 16–20
Roses Bloom Along the Shelter Rows
plant
Grinnell at a glance
- Today vs. normal: 8°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.