Manual J design temperatures for Fresno, CA
Winter 35.1 °F, summer 101.8 °F / 68.5 °F wet bulb, daily range H: the outdoor design conditions for a residential load calculation in Fresno, with a free lookup for any address.
Fresno, CA: Manual J outdoor design conditions
| Winter design dry bulb (99 %) | 35.1 °F |
| Summer design dry bulb (1 %) | 101.8 °F |
| Coincident wet bulb (1 %) | 68.5 °F |
| Daily range class | H |
| Grains difference (75 °F, 50 % RH indoor) | -13 gr/lb |
| Elevation | 328 ft |
ASHRAE Handbook method (2025 edition) at Fresno Yosemite Intl Ap (WMO 723890), the nearest station with a recent record to the city centre. A different address in the area can use a different station: look it up below.
What these numbers mean for a house in Fresno
Heating equipment and heat pumps in Fresno are sized for an outdoor temperature of 35.1 °F: colder than that for only about 88 hours in a typical year. Cooling is sized for 101.8 °F with a coincident wet bulb of 68.5 °F. The daily range is high (over 25 °F), which sets the Manual J cooling-load factors, and a grains difference of -13 gr/lb drives the latent (moisture) load. With indoor design temperatures of 70 °F heating and 75 °F cooling, the design temperature differences are 34.9 °F and 26.8 °F.
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Frequently asked questions
What is the Manual J winter design temperature for Fresno, CA?
35.1 °F: the 99 % heating dry bulb by the ASHRAE method at Fresno Yosemite Intl Ap.
What is the Manual J summer design temperature for Fresno, CA?
101.8 °F dry bulb (1 %) with a coincident wet bulb of 68.5 °F.
Which daily range class does Fresno use?
Class H: high (over 25 °F).
Can I get the values for my exact address?
Yes: type the address in the lookup on this page. A one-page PDF for the permit or rebate file costs 1 credit.
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