Chill hours by location

Ten-season averages for 150 fruit-growing regions and cities, calculated from NASA POWER hourly temperatures with the 45°F Hours, Utah, and Dynamic models. You can also calculate any point yourself below. 30 locations have a full page with the season-by-season table and the varieties that suit them.

Calculate chill for any point

This runs in your browser. It asks NASA POWER for ten years of hourly temperatures at the point you choose, then works out the same three models used on every page here. Nothing is sent anywhere else, and there is no account.

Pick one of the 150 locations

Use where you are

Your browser will ask permission. The coordinates are rounded to 0.1° before they are sent to NASA POWER.

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Chill hours are not USDA hardiness zones

The two answer different questions and are easy to confuse. A USDA hardiness zone describes the coldest winter night a plant has to survive, so it tells you whether a tree or bush lives through the winter. Chill hours describe how long the plant spends in the cold range that ends dormancy, so they tell you whether it will flower and set fruit at all.

Two places can share a hardiness zone and still differ by hundreds of chill hours. That is why a low-chill peach can sit dormant and fruitless in a cold garden it survives easily, and a high-chill apple can leaf out raggedly in a mild one. Fruit trees and berries need both numbers checked, not just the zone on the label.

Australia (25)

Location	Region	45°F Hours	Utah units	Chill portions
Adelaide	South Australia	364	1159	82.5
Ararat	Victoria	1246	2051	117.7
Bacchus Marsh	Victoria	1317	2093	119.0
Bathurst	New South Wales	1494	1929	110.5
Batlow	New South Wales	1604	2030	112.1
Clare	South Australia	748	1430	87.8
Cobram	Victoria	982	1603	92.2
Donnybrook	Western Australia	51	39	41.6
Griffith	New South Wales	886	1333	80.5
Healesville	Victoria	1440	2259	124.6
Hobart	Tasmania	707	2007	126.2
Huonville	Tasmania	1700	2421	147.5
Launceston	Tasmania	1342	2093	129.6
Loxton	South Australia	582	1007	68.9
Manjimup	Western Australia	347	1084	81.1
Melbourne	Victoria	348	1472	97.3
Mildura	Victoria	578	924	65.0
Orange	New South Wales	1494	1929	110.5
Perth	Western Australia	0	-1315	2.5
Renmark	South Australia	542	855	62.1
Shepparton	Victoria	1141	1786	100.5
Stanthorpe	Queensland	576	711	52.4
Sydney	New South Wales	0	-650	9.4
Toowoomba	Queensland	362	129	29.5
Young	New South Wales	1264	1737	97.6

Canada (15)

Location	Region	45°F Hours	Utah units	Chill portions
Abbotsford	British Columbia	1965	1817	131.4
Creston	British Columbia	282	80	47.2
Kelowna	British Columbia	456	177	77.2
Kentville	Nova Scotia	869	584	96.3
Niagara-on-the-Lake	Ontario	1457	1117	98.3
Oliver	British Columbia	466	198	76.0
Osoyoos	British Columbia	466	198	76.0
Penticton	British Columbia	277	76	55.8
Simcoe	Ontario	1064	774	95.7
St. Catharines	Ontario	1303	994	96.9
Summerland	British Columbia	277	76	55.8
Toronto	Ontario	1457	1117	98.3
Vancouver	British Columbia	1984	2352	137.5
Vernon	British Columbia	408	86	56.4
Victoria	British Columbia	1888	2476	141.5

New Zealand (12)

Location	Region	45°F Hours	Utah units	Chill portions
Alexandra	Otago	1893	1463	141.7
Auckland	Auckland	39	469	55.4
Blenheim	Marlborough	1415	2240	137.7
Christchurch	Canterbury	1414	2121	129.2
Cromwell	Otago	1893	1463	141.7
Gisborne	Gisborne	324	1300	92.8
Hastings	Hawke's Bay Region	333	1389	95.1
Havelock North	Hawke's Bay Region	333	1389	95.1
Motueka	Tasman District	284	1517	103.9
Napier	Hawke's Bay Region	333	1389	95.1
Nelson	Nelson Region	1668	2289	141.4
Wellington	Wellington Region	46	1288	99.3

South Africa (15)

Location	Region	45°F Hours	Utah units	Chill portions
Bethlehem	Free State	1115	1008	60.0
Caledon	Western Cape	531	1084	78.5
Cape Town	Western Cape	0	-402	8.2
Ceres	Western Cape	885	1384	89.5
Ficksburg	Free State	1316	1410	89.5
Grabouw	Western Cape	81	557	61.7
Johannesburg	Gauteng	769	659	41.9
Paarl	Western Cape	233	616	62.9
Polokwane	Limpopo	354	120	23.7
Robertson	Western Cape	499	784	63.1
Stellenbosch	Western Cape	81	557	61.7
Tzaneen	Limpopo	120	-329	13.8
Villiersdorp	Western Cape	531	1084	78.5
Wolseley	Western Cape	885	1384	89.5
Worcester	Western Cape	885	1384	89.5

Spain (15)

Location	Region	45°F Hours	Utah units	Chill portions
Albacete	Castille-La Mancha	1336	1652	102.7
Badajoz	Extremadura	918	1400	89.6
Calatayud	Aragon	1585	1715	115.6
Cieza	Murcia	605	969	69.2
Girona	Catalonia	349	1107	79.3
Granada	Andalusia	711	1376	89.2
Huelva	Andalusia	550	878	65.3
León	Castille and León	1712	1833	121.7
Lleida	Catalonia	1208	1688	99.1
Logroño	La Rioja	1539	1803	113.6
Madrid	Madrid	1473	1740	109.7
Murcia	Murcia	605	969	69.2
Sevilla	Andalusia	628	941	66.0
Valencia	Valencia	723	1261	82.8
Zaragoza	Aragon	1179	1640	97.1

Turkey (13)

Location	Region	45°F Hours	Utah units	Chill portions
Amasya	Amasya	1292	1207	104.5
Ankara	Ankara	1301	1110	107.0
Antalya	Antalya	629	1010	77.7
Bursa	Bursa Province	1250	1463	102.3
Denizli	Denizli	1279	1434	98.5
Erzincan	Erzincan	602	382	82.3
Eğirdir	Isparta	1466	1461	109.2
Isparta	Isparta	1466	1461	109.2
Karaman	Karaman	1429	1244	104.7
Konya	Konya	1330	1233	105.1
Malatya	Malatya	1329	1201	99.9
Niğde	Niğde Province	1291	1130	105.5
İnegol	Bursa Province	1339	1352	109.2

United States (55)

Location	Region	45°F Hours	Utah units	Chill portions
Atlanta	Georgia	912	866	72.7
Bakersfield	California	996	1196	80.3
Benton Harbor	Michigan	1202	904	96.4
Biglerville	Pennsylvania	1124	910	99.5
Boise	Idaho	1258	915	105.0
Caldwell	Idaho	1332	1077	108.2
Charlottesville	Virginia	1160	1074	98.0
Chelan	Washington	608	237	76.7
Chico	California	834	1300	83.6
Cornelia	Georgia	1037	1096	85.6
Dallas	Texas	842	679	64.3
Davis	California	910	1432	86.6
Edgefield	South Carolina	916	884	71.8
Erie	Pennsylvania	1190	903	96.0
Fallbrook	California	58	-173	34.2
Fort Valley	Georgia	748	556	59.5
Fredericksburg	Texas	679	376	50.3
Fresno	California	706	1080	72.6
Gainesville	Florida	303	-620	26.9
Geneva	New York	1058	729	92.1
Grand Rapids	Michigan	937	630	91.8
Hammonton	New Jersey	1272	1214	100.6
Hendersonville	North Carolina	1122	1143	97.6
Hollister	California	862	1351	85.3
Hood River	Oregon	1569	1133	120.1
Las Cruces	New Mexico	1070	1103	75.9
Los Angeles	California	228	288	50.0
Lubbock	Texas	1021	938	74.5
Medford	Oregon	1706	1688	119.3
Modesto	California	901	1403	86.2
Mount Vernon	Washington	2084	2166	137.8
Napa	California	1016	1591	96.3
Palisade	Colorado	758	516	96.0
Paso Robles	California	580	1065	77.3
Portland	Oregon	1814	1897	127.4
Prosser	Washington	1478	1269	114.9
Riverside	California	558	678	59.5
Rochester	New York	1031	712	93.0
Sacramento	California	725	1250	81.0
Salem	Oregon	1706	2000	127.2
Salt Lake City	Utah	938	640	96.7
San Diego	California	119	200	48.6
Seattle	Washington	1949	2116	134.2
Spartanburg	South Carolina	1041	1060	82.4
Spokane	Washington	1146	663	100.5
Stockton	California	760	1268	80.6
The Dalles	Oregon	1569	1133	120.1
Traverse City	Michigan	1134	750	87.2
Visalia	California	560	821	66.0
Walla Walla	Washington	1375	976	113.3
Watsonville	California	555	1261	86.7
Wenatchee	Washington	924	468	94.3
Willcox	Arizona	1033	1050	74.7
Winchester	Virginia	1176	1037	99.8
Yakima	Washington	1223	777	109.8

Varieties

Browse fruit varieties by chill requirement

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Generated

This page was generated on 2026-09-06.

About this data

Values are NASA POWER regional estimates (about 0.5° grid), not orchard measurements. Check your local extension service for station data.

Source: NASA POWER hourly 2-metre air temperature (MERRA-2). NASA does not endorse ChillCast.