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

Greybull, Wyoming Weather

Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →

Greybull weather forecast — hour by hour, 7-day outlook, NOAA radar

Greybull, WY
Saturday, July 4 at 11:35 PM
73
°
Clear
Feels like
67°
Humidity
17%
Wind
4 mph
Sunrise
11:33 PM
Sunset
2:59 PM
Greybull, WY
Hour by hour · 24h
24-Hour ForecastGreybull, WY: 24-hour forecast. Temperatures range from 62 to 97 degrees Fahrenheit.
L 62°H 97°
Greybull, WY
7-day forecast
  1. Today
    Jul 4
    Clear
    —
    —
    93°58°—
  2. Sunday
    Jul 5
    Overcast
    —
    —
    97°62°+4°
  3. Monday
    Jul 6
    Overcast
    20%
    —
    92°64°-5°
  4. Tuesday
    Jul 7
    Light Drizzle
    20%
    —
    91°69°-1°
  5. Wednesday
    Jul 8
    Light Drizzle
    13%
    —
    95°66°+4°
  6. Thursday
    Jul 9
    Overcast
    —
    —
    89°66°-6°
  7. Friday
    Jul 10
    Clear
    —
    —
    93°65°+4°
Greybull, WY
Next 24 hours · Mild now
HOT 90°55°80°105°6p12a6a12pnow 75°high 97°low 62°
Greybull, WY
Anemometer · 24h winds · from true
NESW
From · True
SSE
165° · backing 142°
Direction
SSE
165°
Sustained
4
mph
Gust
4
mph
Peak 24h
17
avg 5
Beaufort · 2 · LIGHT 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 5 · pk 17 @ 6:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 176SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Greybull, WY
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
883.5
-1.2 mb in 3h · falling · 26.09 inHg
Now
883.5
mb
3h
-1.2
mb
12h
-6.7
mb
24h
-1.8
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 884–891
875880885890895-21h-18h-15h-12h-9h-6h-3h-24hNOW890.5883.7883.7
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Greybull, WY
Air quality
52
AQI
Moderate
→+3 in 6h

AQI 52 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 40 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 around 1 PM.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5Good
2.7μg/m³
PM 10Good
6μg/m³
NO₂Good
4μg/m³
OzoneDRIVERModerate
85μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 40 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 around 1 PM.

Present
AQI 40
UV peak
0.0 at 1 PM
Sky at peak
clear
Projected peak
AQI 10

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
Greybull, WY
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
181.4mi
UNLIMITED
185 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
05:35 UTC · Greybull, WY · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
05:35 UTC · Greybull, WY · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Greybull, WY
Satellite · infrared · animated
Greybull, WY
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Greybull, WY
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:57 AM
Sunrise
11:33 PM
Daylight
15h 26m
Sunset
2:59 PM
Civil dusk
9:37 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Greybull, WY
The moon
Waning Gibbous
75% illuminated
Moonrise
11:35 PM
Moonset
11:26 AM
In sign
♓︎ Pisces
Greybull, WY
Microseason
Jul 1–5

Monsoon storms drench the south

insect
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Greybull at a glance

  • Today vs. normal: 6°F above the seasonal normal for this latitude
  • Last frost: May 13 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 82426

16-Day Forecast — Greybull

  1. Sat93°58°2%
  2. Sun97°62°3%
  3. Mon92°64°20%
  4. Tue91°69°20%
  5. Wed95°66°13%
  6. Thu89°66°9%
  7. Fri93°65°2%
  8. Sat102°71°1%
  9. Sun111°77°2%
  10. Mon104°75°5%
  11. Tue106°79°9%
  12. Wed107°78°18%
  13. Thu107°78°23%
  14. Fri105°72°27%
  15. Sat105°75°16%
  16. Sun99°74°24%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Greybull

SPC includes Greybull in the general thunderstorm area tomorrow — no severe risk, but storms are possible.

  • TODAYNONENo severe risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: Deep freeze grips the high peaks.January 6–10: Ice thickens on alpine tarns.January 11–15: Springs stir beneath locked earth.January 16–20: Grouse call from the transition zone.January 21–25: First signals of the soil's turning.January 26–31: Stream water crystallizes thick.February 1–5: The year's coldest fortnight begins.February 6–10: East wind carries a subtle promise.February 11–15: Snowmelt springs whisper beneath ice.February 16–20: Red-wing calls rise from the wetlands.February 21–25: Rain begins to trace the snowline upward.February 26–28: Mist gathers in the warming canyons.March 1–5: Grass and trees stir from their sleep.March 6–10: Hibernators break through frozen ground.March 11–15: First blooms open to the spring sun.March 16–20: Mountain bluebirds return to the summits.March 21–25: Spring equinox at the divide.March 26–31: Aspen catkins burst in clusters.April 1–5: Thunderstorms rumble over granite peaks.April 6–10: Swallows and swifts slice the warming sky.April 11–15: Sandhill cranes call through the wetlands.April 16–20: Rainbows arch over the snowfields.April 21–25: New growth explodes across the montane.April 26–30: Last frost yields to summer growth.May 1–5: Wildflowers crest the high meadows.May 6–10: Summer monsoon clouds gather southward.May 11–15: Snowmelt crests toward the divide.May 16–20: High country wildflowers peak.May 21–25: Summer heat accelerates the growing season.May 26–31: Summer settles into the high country.June 1–5: Pikas hayfeeding in granite peaks.June 6–10: Glacier lily carpets the snowmelt.June 11–15: Paintbrush crowns the ridges.June 16–20: Thunderheads build by noon.June 21–25: Long light holds the peaks.June 26–30: Monsoon moisture drifts north.July 1–5: Monsoon storms drench the south.July 6–10: Wind builds through canyons.July 11–15: Lightning crowns every peak.July 16–20: Elk herds claim alpine meadows.July 21–25: Pika caches reach their peak.July 26–31: Monsoon pulses weaken northward.August 1–5: Summer heat breaks with monsoon.August 6–10: First frost creeps to peaks.August 11–15: Cool wind returns from north.August 16–20: Monsoon clouds gather over the peaks.August 21–25: The monsoon breaks into scattered showers.August 26–31: Summer insects thin as autumn wind rises.September 1–5: Elk descend from summer high meadows.September 6–10: Dew crystallizes on high grass at dawn.September 11–15: Hawks begin the long crossing southward.September 16–20: Equinox: darkness claims the high passes.September 21–25: Thunder retreats as the monsoon dies.September 26–30: First frost hardens the high valleys.October 1–5: October: the aspen stands reach their peak.October 6–10: Aspen gold slides downslope with the chill.October 11–15: Snow settles on the high passes.October 16–20: Elk bugling fades as rut nears its end.October 21–25: First hard frost grips the basin.October 26–31: Late rains settle into November patterns.November 1–5: Aspen canopy falls to earth.November 6–10: Granite bones emerge from cover.November 11–15: Earth begins to harden.November 16–20: Bare ranges hold silence.November 21–25: Snow returns to the peaks.November 26–30: North wind strips the landscape.December 1–5: Deep darkness settles over the ranges.December 6–10: Winter locks the high country.December 11–15: Elk withdraw to winter range.December 16–20: Ice thickens across frozen water.December 21–25: Winter solstice — the sun returns.December 26–31: The year closes in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Monsoon storms drench the south

Monsoon established in southern Mountain West (New Mexico, southern Utah, Arizona north); afternoon downpours and lightning common.

Day 186 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
April——
Maylettuce, peas, spinach, radisheslettuce, peas, radishes
Junelettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
Augusttomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
October—winter squash, tomatoes (last)
November——
December——

A year in weather

In Greybull, July runs warmest near 73°F and January coldest around 16°F, while May is the wettest month (1.4 inches) and March the driest (0.2 inches).

MonthMean tempPrecipRainy days
January16°0.3″1
February23°0.4″1
March37°0.2″1
April46°0.6″2
May56°1.4″4
June66°1.2″3
July73°0.5″2
August70°0.3″1
September60°1.0″2
October46°0.8″2
November31°0.4″2
December19°0.2″1

Regional context

Per NOAA NCEI 1991-2020 normals, Greybull runs from a 16°F January mean to 73°F in July, a 57°F seasonal spread, with near 7.2 inches of precipitation across about 22 wet days.

Greybull's rain peaks in summer: May brings 1.4 inches over 3.7 thunderstorm-fed days, while March sees just 0.2 inches across 1.0 days under cooler, drier air. That summer-storm rhythm groups Greybull with places like Basin, WY, Shell, WY and Manderson, WY.

Once Greybull passes late-May, overnight freezes fade and kale, peas, spinach, and parsnips can be sown. Greybull's heat-lovers — tomatoes, peppers, squash — hold off until Greybull's frost risk clears, 10-14 days on. Frost returns to Greybull near early-October, ending the tender-crop season. Greybull's low ground holds frost later into spring than Greybull's benches, which run 3-5 days ahead.

Similar climates: Basin, WY, Shell, WY, Manderson, WY, Burlington, WY, Hyattville, WY.

Frequently asked

When does it freeze in Greybull?
Frost typically leaves Greybull by mid-May and returns to Greybull near mid-October.
What is the rainy season in Greybull?
May is the wettest month in Greybull, about 1.4 inches on average; the year totals roughly 7 inches.
What is the warmest month in Greybull?
The warmest stretch in Greybull comes in July, around 73°F on average.
What is the coldest month in Greybull?
On average January is the chilliest month in Greybull, about 16°F.
When can I start a vegetable garden in Greybull?
Frost-hardy sowings begin at mid-May in Greybull; warm-season starts follow two weeks on.
How many rainy days does Greybull get?
Expect roughly 22 wet days a year in Greybull.
What hardiness zone is Greybull?
Greybull sits in the USDA zone set by January lows near 16°F; the USDA ZIP tool gives the band.
What is the 10-day forecast for Greybull?
Greybull's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Greybull?
See this week's day-by-day rain chances for Greybull in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Greybull?
Current conditions for Greybull and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Greybull forecast updated?
The Greybull forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Greybull?
Today's sunrise and sunset times for Greybull are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Greybull?
The next few days in Greybull's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Greybull, Wyoming occupies a cold semi-arid zone, with January means near 16°F and July around 73°F — a 57°F swing.

Yearly precipitation in Greybull totals around 7 inches, spread over about 22 days of rain or snow.

Latitude 44.5°N gives Greybull its 57°F swing, and with it the rhythm of Greybull's growing season.

All cities in Wyoming →

Billings, MT weather →

ZIP codes in Greybull

  • 82426

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.