What USDA hardiness zone is Huntingdon County, Pennsylvania?

Huntingdon County, Pennsylvania spans USDA hardiness zones 6b to 7a. 57% of its ZIP codes are zone 6b, so there is no single zone for the county.

When is the last spring frost in Huntingdon County, Pennsylvania?

The median last spring freeze runs April 18 – April 23 across the 5 NOAA weather stations serving Huntingdon County, Pennsylvania, from NOAA 1991-2020 Climate Normals. Half of years freeze later than the median.

Pennsylvania

Planting zones in Huntingdon County, Pennsylvania

This county spans USDA zones 6b to 7a, so there is no single zone for Huntingdon County and anyone who gives you one is rounding. 57% of its ZIP codes are zone 6b; the rest are not.

USDA zones 6b–7a 2 zones across 28 ZIP codes

ZIP codes 28 28 have a NOAA station within range

Weather stations 5 NOAA 1991–2020 normals, across 875 sq mi

Your ZIP code

Get the exact answer for your address

Everything above describes Huntingdon County, Pennsylvania as a whole. Hardiness zones and freeze dates are published per ZIP code, so yours is exact — enter it and this page will tell you your zone, which NOAA station it comes from and how far away that station is.

The growing season in Huntingdon County is closing

Nothing in the 32-crop table still has time to mature here. The first fall freeze normally arrives October 21 – October 28 across the 5 NOAA stations serving this county .

Your next season already has a date

The first job of it is 🧅 Green Onions, start indoors, around February 21 – February 26 — counted back from a last spring freeze of April 18 – April 23 here.

Every spring date for your ZIP →

These are ranges across the whole county. The ZIP lookup above gives the dates from your own nearest station instead.

All 5 stations agreeAt least one station

Every one of the 5 NOAA stations serving this county counts April 23 – October 21 as growing season (181 days). Widening to any single station gives April 18 – October 28 (193 days).

Which zone you are in depends where you are

Huntingdon County covers 2 hardiness zones. A guide that gives the county one zone has picked whichever is largest and rounded everyone else into it — fine for the 57% in zone 6b and wrong for the other 43%. Here is the actual split.

Zone	ZIP codes	Share
6b	16	57%
7a	12	43%

Zones are published per ZIP code, so yours is exact even though the county's is not. The hardiness tool will tell you which one you are in.

Your freeze dates

Last spring freeze April 18 – April 23

First fall freeze October 21 – October 28

Across the 5 NOAA stations serving this county. These are medians — half of years freeze later than the date shown — so treat the later end of each range as the cautious one.

The growing season runs 177–191 days depending which station you are nearest, as published by NOAA rather than computed from the dates above. Summer highs average 79.1–85.2 °F in June–August. Summer rain over the same months runs 10.2–12.0" across those 5 stations, against the rough inch a week — about 13 inches over the same 92 days — that a vegetable garden is usually reckoned to want. The middle station covers about 86% of it, so expect to make up the rest. The inches are NOAA's published normals; the inch a week is a rule of thumb, and it takes no account of a 83 °F summer afternoon drying the soil faster than a cool one.

Every ZIP code in Huntingdon County

Zones are published per ZIP code, not per county, so this is the exact answer rather than the county's average. The station column is the nearest one to that ZIP code's centroid and how far away it is — the same figure the tools use, shown here so you can see which ZIP codes are well covered and which are reaching.

ZIP code	USDA zone	Nearest NOAA station	Distance
16611	6b	Raystown Lake 2, PA	21.1 km
16621	6b	Raystown Lake 2, PA	14.0 km
16622	6b	Raystown Lake 2, PA	5.9 km
16623	6b	Raystown Lake 2, PA	12.0 km
16634	6b	Altoona Blair Co AP, PA	15.7 km
16638	6b	Altoona Blair Co AP, PA	11.1 km
16647	7a	Raystown Lake 2, PA	3.2 km
16652	6b	Raystown Lake 2, PA	18.3 km
16654	7a	Raystown Lake 2, PA	12.9 km
16657	6b	Raystown Lake 2, PA	8.7 km
16669	6b	State College, PA	15.6 km
16674	6b	Raystown Lake 2, PA	21.7 km
16683	6b	State College, PA	22.1 km
16685	6b	Raystown Lake 2, PA	11.3 km
16694	6b	Altoona Blair Co AP, PA	19.7 km
17002	6b	Raystown Lake 2, PA	19.6 km
17052	6b	Raystown Lake 2, PA	13.9 km
17060	6b	Raystown Lake 2, PA	23.3 km
17066	7a	Raystown Lake 2, PA	18.9 km
17213	7a	Raystown Lake 2, PA	29.5 km
17215	7a	Chambersburg 1 Ese, PA	26.2 km
17239	7a	Shippensburg, PA	27.7 km
17243	7a	Raystown Lake 2, PA	24.6 km
17249	7a	Raystown Lake 2, PA	21.5 km
17253	7a	Raystown Lake 2, PA	19.7 km
17255	7a	Chambersburg 1 Ese, PA	30.7 km
17260	7a	Raystown Lake 2, PA	18.1 km
17264	7a	Raystown Lake 2, PA	23.5 km

ZIP-code positions are area centroids, so a large rural ZIP code's listed distance is measured from the middle of its area rather than from any particular address in it.

When to start seeds in Huntingdon County

Every date below is anchored on the last spring freeze at each station and reported as a range across all 5 of them, because no one station speaks for the county.

Crop	Job	When	Offset
🧅 Green Onions	Start indoors	February 21 – February 26	8 wk before
🌶️ Peppers	Start indoors	February 21 – February 26	8 wk before
🥦 Broccoli	Start indoors	March 7 – March 12	6 wk before
🥬 Cabbage	Start indoors	March 7 – March 12	6 wk before
🥬 Collards	Start indoors	March 7 – March 12	6 wk before
🥬 Kale	Start indoors	March 7 – March 12	6 wk before
🥬 Leaf Lettuce	Start indoors	March 7 – March 12	6 wk before
🫛 Peas	Direct sow	March 7 – March 12	6 wk before
🥬 Spinach	Direct sow	March 7 – March 12	6 wk before
🍠 Sweet Potato	Start indoors	March 7 – March 12	6 wk before
🍅 Tomatoes	Start indoors	March 7 – March 12	6 wk before
🥬 Bok Choy	Start indoors	March 14 – March 19	5 wk before
🥬 Kohlrabi	Start indoors	March 14 – March 19	5 wk before
🥬 Swiss Chard	Start indoors	March 14 – March 19	5 wk before
🥬 Arugula	Direct sow	March 21 – March 26	4 wk before
🥬 Baby Salad Greens	Direct sow	March 21 – March 26	4 wk before
🥕 Beets	Direct sow	March 21 – March 26	4 wk before
🧅 Green Onions	Direct sow	March 21 – March 26	4 wk before
🥬 Mustard Greens	Direct sow	March 21 – March 26	4 wk before
🌶️ Okra	Start indoors	March 21 – March 26	4 wk before
🌱 Radishes	Direct sow	March 21 – March 26	4 wk before
🥔 Turnips	Direct sow	March 21 – March 26	4 wk before
🥬 Cabbage	Set out	March 28 – April 2	3 wk before
🥕 Carrots	Direct sow	March 28 – April 2	3 wk before
🥬 Collards	Direct sow	March 28 – April 2	3 wk before
🥬 Collards	Set out	March 28 – April 2	3 wk before
🥒 Cucumbers	Start indoors	March 28 – April 2	3 wk before
🧅 Green Onions	Set out	March 28 – April 2	3 wk before
🥬 Kale	Direct sow	March 28 – April 2	3 wk before
🥬 Kale	Set out	March 28 – April 2	3 wk before
🥬 Kohlrabi	Direct sow	March 28 – April 2	3 wk before
🥬 Kohlrabi	Set out	March 28 – April 2	3 wk before
🥬 Leaf Lettuce	Direct sow	March 28 – April 2	3 wk before
🎃 Pumpkins	Start indoors	March 28 – April 2	3 wk before
🎃 Summer Squash	Start indoors	March 28 – April 2	3 wk before
🎃 Winter Squash	Start indoors	March 28 – April 2	3 wk before
🥒 Zucchini	Start indoors	March 28 – April 2	3 wk before
🥬 Bok Choy	Direct sow	April 4 – April 9	2 wk before
🥬 Bok Choy	Set out	April 4 – April 9	2 wk before
🥦 Broccoli	Set out	April 4 – April 9	2 wk before
🌿 Cilantro	Direct sow	April 4 – April 9	2 wk before
🥬 Leaf Lettuce	Set out	April 4 – April 9	2 wk before
🥬 Swiss Chard	Direct sow	April 4 – April 9	2 wk before
🥬 Swiss Chard	Set out	April 4 – April 9	2 wk before
🌿 Dill	Direct sow	April 11 – April 16	1 wk before
🫘 Bush Beans	Direct sow	April 25 – April 30	1 wk after
🥒 Cucumbers	Set out	April 25 – April 30	1 wk after
🎃 Pumpkins	Direct sow	April 25 – April 30	1 wk after
🎃 Pumpkins	Set out	April 25 – April 30	1 wk after
🎃 Summer Squash	Direct sow	April 25 – April 30	1 wk after
🎃 Summer Squash	Set out	April 25 – April 30	1 wk after
🌽 Sweet Corn	Direct sow	April 25 – April 30	1 wk after
🍅 Tomatoes	Set out	April 25 – April 30	1 wk after
🎃 Winter Squash	Direct sow	April 25 – April 30	1 wk after
🎃 Winter Squash	Set out	April 25 – April 30	1 wk after
🥒 Zucchini	Direct sow	April 25 – April 30	1 wk after
🥒 Zucchini	Set out	April 25 – April 30	1 wk after
🥒 Cucumbers	Direct sow	May 2 – May 7	2 wk after
🌶️ Okra	Direct sow	May 2 – May 7	2 wk after
🌶️ Okra	Set out	May 2 – May 7	2 wk after
🌶️ Peppers	Set out	May 2 – May 7	2 wk after
🫘 Southern Peas	Direct sow	May 2 – May 7	2 wk after
🍠 Sweet Potato	Set out	May 2 – May 7	2 wk after

Offsets are published guidance; the dates they land on are computed from measured NOAA normals. The seed-starting tool does this for your own ZIP code and counts the days.

What survives the winter changes across Huntingdon County

Zone 7a carries 58 of 74 perennial edibles; zone 6b carries 51. The best number is not always the warmest zone — the count peaks in the middle and falls both ways, because the warm end loses plants to insufficient winter chill and summer heat, not to cold.

Hardiness ranges are a judgement, published by growers rather than measured; the zone they are compared against is measured. On a warm-end verdict, check with your local extension service — a coastal zone 8 and an inland zone 8 are not the same summer.

Cautious — shortens the seasonMedian across stationsOptimistic

Last spring freeze: Plan to May 11 to be careful. Median April 18 – April 23 across 5 stations; April 3 is the optimistic end.
First fall freeze: Plan to October 5 to be careful. Median October 21 – October 28 across 5 stations; November 10 is the optimistic end.

NOAA publishes these as probabilities, not averages — the middle figure is a median, so half of years fall either side of it. The cautious end is the 10% tail: in roughly nine years in ten the freeze falls on the safe side of it.

The 5 stations behind these numbers

All 5 NOAA stations whose normals this page quotes, spanning about 95 km north to south. Every one is named with its identifier in the station list below — this page does not single one out, because no one station speaks for a whole county.

A relative sketch, not a map with a projection: longitude is adjusted for latitude so the shape is not stretched, and there is no basemap. For the one station nearest a specific address, with its real distance, use the ZIP lookup above.

These are the stations this county's ZIP codes actually cite as nearest — not a claim that each one sits inside its boundary, since a rural ZIP legitimately reaches over it. Every figure above comes from them, and each is named so you can check it.

Station	NOAA ID	Last spring freeze	First fall freeze	Season
Altoona Blair Co AP, PA	USW00014736	April 23	October 21	177 days
Chambersburg 1 Ese, PA	USC00361354	April 18	October 25	188 days
Raystown Lake 2, PA	USC00367312	April 19	October 28	191 days
Shippensburg, PA	USC00368073	April 19	October 24	188 days
State College, PA	USC00368449	April 20	October 26	187 days

These are medians, not averages — NOAA publishes freeze dates as a probability distribution, and half of years freeze later than the date shown.

Your own ZIP

Work out your own dates

This page describes a whole county. Every tool below answers for one ZIP code, which is the grain the underlying data is published at.

Other places to compare

Huntingdon County sits in Pennsylvania. That page carries the whole state's zone spread, its metro areas, and every other county in it with a page here.

More of Pennsylvania

Counties with the same zones — 6b–7a

Matched on the exact zone set, not a dominant zone, so the winter answer on these pages really is the same one as here.

Gear

If you want to act on this

Each link opens an Amazon search rather than a product we picked. We have not tested these and do not rank them — the search is the honest version, and you choose.

Row cover and frost clothThe season here closes at the first fall freeze dated above — a cover buys back some of those days at the end.
MulchFor the perennials nearest their cold limit in zone 6b, where an insulated crown is what decides whether they come back.

As an Amazon Associate we earn from qualifying purchases. That costs you nothing extra, and it buys no influence over anything on this site: the dates come from NOAA normals and the zones from the USDA, and no product affects either.

Sources

Where these numbers come from

Hardiness zones are the USDA 2023 Plant Hardiness Zone Map, published per ZIP code by PRISM at Oregon State. Freeze dates and growing-season lengths are NOAA 1991–2020 Climate Normals, taken per station and cited above by name and NOAA ID.

County boundaries come from the Census ZCTA-to-county relation, which is what places each ZIP code — and which treats parishes, boroughs and census areas as county equivalents. No station is chosen to represent this county: every range above is taken across all of them and the count is stated, because picking one would be a judgement dressed as a measurement.