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

Planting zone for 15801 — Du Bois, PA

ZIP code 15801 (Du Bois, Clearfield County) is in USDA zone 6a: the coldest winter night averages −10 to −5 °F. The median last spring frost is May 6 and the first fall frost October 14.

Where ZIP 15801 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.

Zone6a−10 to −5 °F
Coldest night−23.3 to −20.6 °C
Last frostMay 6
First frostOct 14
2012 zone5b

Was 5b on the 2012 map — half a zone warmer now. The zone is the one at the center of the ZIP code; hilly ZIPs can span two zones. What zone 6a means →

Frost forecast — next 7 nights

live from the National Weather Service

Loading the forecast for Du Bois, PA…

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 Du Bois, PA

JanFebMarAprMayJunJulAugSepOctNovDec
Blue: frost possible · fading green: frost risk falling or rising (90% → 10%) · green: frost-free
Last spring frostMay 6median — 50% chance of a later frost
Safe for tender plantsMay 23only 10% chance of frost after
First fall frostOctober 14median — 10% chance by Sep 29
Growing season160 daysfrost-free, median

A hard freeze (28 °F) usually ends around April 24 and returns around October 28.

From the NOAA station Dubois Jefferson Co. Airport, PA — 9 miles away, elevation 1,814 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 15801

JanFebMarAprMayJunJulAugSepOctNovDec
PeasSow outdoors · Mar 25 – Apr 8
SpinachSow outdoors · Mar 25 – Apr 15
Broccoli, cabbageStart indoors · Feb 25 – Mar 11
Broccoli, cabbageTransplant · Apr 15 – Apr 29
Onion setsPlant outdoors · Apr 8 – Apr 22
PotatoesPlant outdoors · Apr 15 – Apr 29
LettuceSow outdoors · Apr 8 – Apr 22
Carrots, beetsSow outdoors · Apr 15 – Apr 29
TomatoesStart indoors · Mar 11 – Mar 25
TomatoesTransplant · May 13 – May 27
Peppers, eggplantStart indoors · Feb 25 – Mar 11
Peppers, eggplantTransplant · May 20 – Jun 3
BeansSow outdoors · May 13 – May 27
Sweet cornSow outdoors · May 13 – May 27
Cucumbers, squashSow outdoors · May 13 – May 27
Fall lettuce, spinachSow outdoors · Aug 19 – Sep 2
GarlicPlant cloves · Sep 30 – Nov 4
Start seeds indoorsSow or plant outdoorsFall plantingMedian last & first frost

Counted from the median last spring frost (May 6) and first fall frost (Oct 14) 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 15801 came on Mar 25 — 14 days earlier than the 1991–2020 average (Apr 8).

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 Du Bois, PA

The soil mapped at the center of ZIP 15801 is Gilpin — slightly decomposed plant material, well drained.

TextureSlightly decomposed plant materialtop layer
pH5.0strongly acidic; most vegetables like 6.0–7.0
DrainageWell drainednatural drainage class
Organic matter72%high
Hydrologic groupCwater soaks in slowly
Farmland classprime farmlandUSDA classification

Map unit: Gilpin channery silt loam, 3 to 8 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 15801; soils change within a few hundred feet, so a home soil test (pH, nutrients) is still the best guide.

Climate in Du Bois, PA

Summer high79 °Faverage high, July
Winter low17 °Faverage low, January
Hot days2days a year at 90 °F or more
Freezing nights138nights a year at 32 °F or less
Growing degree days2,428base 50 °F — the season’s usable heat
Longest day15 h 08 mindaylight on June 21
Shortest day9 h 12 mindaylight on December 21
Onions to growLong-daysummer days reach 15+ hours, enough for long-day varieties (intermediate types work too)
Precipitation42.4 inper year, rain and melted snow

Average high and low, by month

10°20°30°40°50°60°70°80°90°32 °FJanuary: average high 32 °F, low 17 °F 32°17° JanFebruary: average high 35 °F, low 19 °F 35°19° FebMarch: average high 44 °F, low 26 °F 44°26° MarApril: average high 58 °F, low 37 °F 58°37° AprMay: average high 68 °F, low 47 °F 68°47° MayJune: average high 75 °F, low 55 °F 75°55° JunJuly: average high 79 °F, low 59 °F 79°59° JulAugust: average high 78 °F, low 58 °F 78°58° AugSeptember: average high 71 °F, low 51 °F 71°51° SepOctober: average high 59 °F, low 41 °F 59°41° OctNovember: average high 47 °F, low 32 °F 47°32° NovDecember: average high 36 °F, low 23 °F 36°23° Dec

Precipitation by month inches

0″1″2″3″4″5″January: 2.93 in precipitation 2.9 JanFebruary: 2.38 in precipitation 2.4 FebMarch: 3.26 in precipitation 3.3 MarApril: 3.72 in precipitation 3.7 AprMay: 3.69 in precipitation 3.7 MayJune: 4.66 in precipitation 4.7 JunJuly: 4.36 in precipitation 4.4 JulAugust: 3.89 in precipitation 3.9 AugSeptember: 3.96 in precipitation 4.0 SepOctober: 3.40 in precipitation 3.4 OctNovember: 3.21 in precipitation 3.2 NovDecember: 2.96 in precipitation 3.0 Dec

NOAA NCEI U.S. Climate Normals 1991–2020 — temperature: Dubois Jefferson Co. Airport, PA (9 mi away); precipitation: Dubois Jefferson Co. Airport, PA (9 mi away). Daylight is calculated from latitude.

Nearby ZIP codes

All 8 nearest ZIP codes share zone 6a.

158406a
Falls Creek, PA · 6 mi
158566a
Rockton, PA · 7 mi
158486a
Luthersburg, PA · 7 mi
158656a
Sykesville, PA · 7 mi
158666a
Troutville, PA · 8 mi
158496a
Penfield, PA · 9 mi
158236a
Brockport, PA · 9 mi
168386a
Grampian, PA · 9 mi

Pennsylvania planting zones →

Questions about 15801

What planting zone is ZIP code 15801?

ZIP code 15801 (Du Bois, PA) is in USDA hardiness zone 6a on the 2023 map: the coldest night of an average winter reaches −10 to −5 °F (−23.3 to −20.6 °C).

When is the last frost in Du Bois, PA?

The median last spring frost (32 °F) near 15801 is May 6; after May 23 there is only a 10% chance of frost. Data: NOAA 1991–2020 normals, Dubois Jefferson Co. Airport station.

When is the first frost in Du Bois, PA?

The median first fall frost near 15801 is October 14, giving a median frost-free growing season of 160 days.

When should I plant tomatoes in 15801?

Start tomato seeds indoors around Mar 11 – Mar 25 and set transplants outside around May 13 – May 27, one to three weeks after the median last frost.

How much rain and snow does 15801 get?

About 42.4 inches of precipitation a year (NOAA 1991–2020 normals, Dubois Jefferson Co. Airport station).

How hot do summers get in Du Bois, PA?

The average high peaks at 79 °F in July, with about 2 days a year at 90 °F or more.

What kind of soil does 15801 have?

The USDA soil survey maps Gilpin at the center of ZIP 15801: slightly decomposed plant material, well drained, pH about 5.0 (strongly acidic).

Did spring come early in Du Bois, PA in 2026?

Spring leaf-out near 15801 came on Mar 25 in 2026, 14 days earlier than the 1991–2020 average (Apr 8), according to the USA National Phenology Network Spring Index.

What kind of onions grow in Du Bois, PA?

Long-day onions: the longest day near 15801 is 15 h 08 min, so summer days reach 15+ hours, enough for long-day varieties (intermediate types work too).

Did the zone for 15801 change?

Yes. The 2012 USDA map put 15801 in zone 5b; the 2023 map puts it in zone 6a. The newer map uses 1991–2020 data and more weather stations.