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

Weather in Dayton, Wyoming

High country wildflowers peak. Day 59 of spring. Read this microseason across nine climate regions →

Dayton, WY
Sunday, May 17 at 5:09 AM
46
°
Light Drizzle
Feels like
33°
Humidity
79%
Wind
25 mph
Sunrise
5:38 AM
Sunset
8:32 PM
Dayton, WY
Hour by hour · 24h
53°
11p
51°
12a
49°
1a
47°
2a
49°
3a
47°
4a
44°
5a
41°
6a
43°
7a
50°
8a
57°
9a
59°
10a
60°
11a
62°
12p
64°
1p
65°
2p
67°
3p
67°
4p
66°
5p
65°
6p
63°
7p
59°
8p
54°
9p
51°
10p
L 41°H 67°
Dayton, WY
7-day forecast
  1. Today
    May 16
    Drizzle
    71°36°
  2. Sunday
    May 17
    Overcast
    22%
    55°39°
  3. Monday
    May 18
    Snow
    90%
    46°33°
  4. Tuesday
    May 19
    Overcast
    17%
    62°31°
  5. Wednesday
    May 20
    Showers
    39%
    62°43°
  6. Thursday
    May 21
    Showers
    35%
    61°44°
  7. Friday
    May 22
    Light Drizzle
    33%
    71°43°
Dayton, WY
Anemometer · 24h winds · from true
NESW
From · True
NW
320° · backing 148°
Direction
NW
320°
Sustained
25
mph
Gust
41
mph
Peak 24h
45
avg 11
Beaufort · 6 · STRONG 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 45 @ 10:00p
−24h−18h−12h−6hnow
Sustained 25 mph with gusts pulsing to 41 — flags snap, branches bend.
Dayton, WY
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
871.8
+1.0 mb in 3h · rising · 25.74 inHg
Now
871.8
mb
3h
+1.0
mb
12h
+0.4
mb
24h
-0.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 870875
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Dayton, WY
Air quality
42
AQI
Good
PM 2.5
5.0 μg/m³
PM 10
9.2 μg/m³
NO₂
2.4 μg/m³
Ozone
77.0 μg/m³
UV Index
0.0 Low
Dayton, WY
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
11:06 AM
Sunrise
5:38 AM
Daylight
14h 54m
Sunset
8:32 PM
Civil dusk
3:07 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
Dayton, WY
The moon
New Moon
0% illuminated
Moonrise
11:40 AM
Moonset
3:12 AM
In sign
♊︎ Gemini
Dayton, WY
Microseason · 28 of 72
May 16–20

High country wildflowers peak

bird
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

Dayton at a glance

  • Today vs. normal: 21°F below the seasonal normal for this latitude
  • Last frost: May 15 (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

Cool-season window is open

As of May 17, the cool-season window is open or about to open. Direct-sow peas, lettuce, spinach, radishes, and brassicas now. Hold off on warm-season crops until 1–2 weeks after the last spring frost (around May).

ZIP codes in Dayton

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.