Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Planting zone for 83116 — Diamondville, WY

ZIP code 83116 (Diamondville, Lincoln County) is in USDA zone 4b: the coldest winter night averages −25 to −20 °F. The median last spring frost is June 14 and the first fall frost September 1.

Where ZIP 83116 is

Outlined: the ZIP code area · tap the map for the zone at any spot · scroll or pinch to zoom

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.

Zone4b−25 to −20 °F
Coldest night−31.7 to −28.9 °C
Last frostJun 14
First frostSep 1
2012 zone4b

Same zone as on the 2012 map. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 4b means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Diamondville, WY…

Forecast data: National Weather Service (api.weather.gov), public domain. This is not a warning service — for official frost and freeze warnings see weather.gov.

Frost dates in Diamondville, WY

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostJune 14median — 50% chance of a later frost
Safe for tender plantsJune 30only 10% chance of frost after
First fall frostSeptember 1median — 10% chance by Aug 18
Growing season76 daysfrost-free, median

A hard freeze (28 °F) usually ends around May 30 and returns around September 11.

From the NOAA station Randolph, UT — 34 miles away, elevation 6,290 ft. NOAA NCEI U.S. Climate Normals 1991–2020, 32 °F threshold. Low spots and valleys can freeze later in spring than the station.

When to plant vegetables in 83116

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · May 3 – May 17
SpinachSow outdoors · May 3 – May 24
Broccoli, cabbageStart indoors · Apr 5 – Apr 19
Broccoli, cabbageTransplant · May 24 – Jun 7
Onion setsPlant outdoors · May 17 – May 31
PotatoesPlant outdoors · May 24 – Jun 7
LettuceSow outdoors · May 17 – May 31
Carrots, beetsSow outdoors · May 24 – Jun 7
TomatoesStart indoors · Apr 19 – May 3
TomatoesTransplant · Jun 21 – Jul 5
Peppers, eggplantStart indoors · Apr 5 – Apr 19
Peppers, eggplantTransplant · Jun 28 – Jul 12
BeansSow outdoors · Jun 21 – Jul 5
Sweet cornSow outdoors · Jun 21 – Jul 5
Cucumbers, squashSow outdoors · Jun 21 – Jul 5
Fall lettuce, spinachSow outdoors · Jul 7 – Jul 21
GarlicPlant cloves · Aug 18 – Sep 22
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (Jun 14) and first fall frost (Sep 1) with the rules of thumb U.S. extension services publish. Cool-season crops take a light frost; warm-season crops do best once the soil is above about 60 °F.

When spring arrived in 2026

In 2026, spring leaf-out near 83116 came on Apr 8 — 26 days earlier than the 1991–2020 average (May 4).

JanFebMarAprMayJun

The Spring Index marks the day when accumulated warmth is enough for lilac and honeysuckle to leaf out — a widely used signal that the growing season has started. Source: USA National Phenology Network, www.usanpn.org — Spring Indices, first leaf, 2026 (data as of 2026-09-08) and 30-year average 1991–2020 (CC BY 4.0).

Soil in Diamondville, WY

The soil mapped at the center of ZIP 83116 is Delridge — gravelly loam, well drained.

TextureGravelly loama good balance for most vegetables
pH8.2alkaline; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter1.13%low — add compost
Hydrologic groupCwater soaks in slowly
Farmland classNot prime farmlandUSDA classification

Map unit: Delridge-Yamacall-Bronec complex, 2 to 25 percent slopes.

Soil Survey Staff, Natural Resources Conservation Service, USDA. Soil Survey Geographic (SSURGO) Database, via Soil Data Access, accessed 2026-10-29. The soil at the center point of ZIP 83116; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Diamondville, WY

Summer high83 °Faverage high, July
Winter low2 °Faverage low, January
Hot days4days a year at 90 °F or more
Freezing nights246nights a year at 32 °F or less
Growing degree days1,097base 50 °F — the season’s usable heat
Longest day15 h 13 mindaylight on June 21
Shortest day9 h 08 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation9.4 inper year, rain and melted snow
Snowfall50 inper year

Average high and low, by month

−10°0°10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 31 °F, low 2 °F 31°2° JanFebruary: average high 34 °F, low 3 °F 34°3° FebMarch: average high 43 °F, low 13 °F 43°13° MarApril: average high 52 °F, low 21 °F 52°21° AprMay: average high 63 °F, low 31 °F 63°31° MayJune: average high 73 °F, low 37 °F 73°37° JunJuly: average high 83 °F, low 43 °F 83°43° JulAugust: average high 81 °F, low 41 °F 81°41° AugSeptember: average high 72 °F, low 32 °F 72°32° SepOctober: average high 57 °F, low 23 °F 57°23° OctNovember: average high 42 °F, low 13 °F 42°13° NovDecember: average high 31 °F, low 3 °F 31°3° Dec

Precipitation by month inches · ❄ = snowfall

0″1″2″January: 0.69 in precipitation, 11.6 in snowfall 0.7❄12 JanFebruary: 0.60 in precipitation, 9.6 in snowfall 0.6❄10 FebMarch: 0.65 in precipitation, 6.1 in snowfall 0.7❄6 MarApril: 0.66 in precipitation, 3 in snowfall 0.7❄3 AprMay: 1.38 in precipitation, 1.4 in snowfall 1.4❄1 MayJune: 0.94 in precipitation, 0.1 in snowfall 0.9 JunJuly: 0.50 in precipitation 0.5 JulAugust: 0.86 in precipitation 0.9 AugSeptember: 0.97 in precipitation, 0.4 in snowfall 1.0 SepOctober: 0.84 in precipitation, 1.8 in snowfall 0.8❄2 OctNovember: 0.65 in precipitation, 6.2 in snowfall 0.7❄6 NovDecember: 0.67 in precipitation, 9.5 in snowfall 0.7❄10 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Kemmerer 2n, WY (4 mi away); precipitation: Kemmerer 2n, WY (4 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

6 of the 8 nearest ZIP codes are in a different zone — elevation and distance from water change winter lows quickly.

831214b
Frontier, WY · 6 mi
831244b
Opal, WY · 12 mi
831015a
Kemmerer, WY · 15 mi
840644a
Randolph, UT · 30 mi
831144a
Cokeville, WY · 32 mi
829375a
Lyman, WY · 32 mi
829335b
Fort Bridger, WY · 34 mi
831234a
La Barge, WY · 36 mi

Wyoming planting zones →

Questions about 83116

What planting zone is ZIP code 83116?

ZIP code 83116 (Diamondville, WY) is in USDA hardiness zone 4b on the 2023 map: the coldest night of an average winter reaches −25 to −20 °F (−31.7 to −28.9 °C).

When is the last frost in Diamondville, WY?

The median last spring frost (32 °F) near 83116 is June 14; after June 30 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Randolph station.

When is the first frost in Diamondville, WY?

The median first fall frost near 83116 is September 1, giving a median frost-free growing season of 76 days.

When should I plant tomatoes in 83116?

Start tomato seeds indoors around Apr 19 – May 3 and set transplants outside around Jun 21 – Jul 5, one to three weeks after the median last frost.

How much rain and snow does 83116 get?

About 9.4 inches of precipitation a year and 50 inches of snowfall (NOAA 1991–2020 normals, Kemmerer 2n station).

How hot do summers get in Diamondville, WY?

The average high peaks at 83 °F in July, with about 4 days a year at 90 °F or more.

What kind of soil does 83116 have?

The USDA soil survey maps Delridge at the center of ZIP 83116: gravelly loam, well drained, pH about 8.2 (alkaline).

Did spring come early in Diamondville, WY in 2026?

Spring leaf-out near 83116 came on Apr 8 in 2026, 26 days earlier than the 1991–2020 average (May 4), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Diamondville, WY?

Long-day onions: the longest day near 83116 is 15 h 13 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).