CLIMATE DATA FOR ENERGY SCHEMING CLIMATE FILES:
Indianapolis, IN

Sources for Climate Information


General Climate Information

NAME 

Indianapolis, IN

Latitude 

39

Longitude 

86

Standard. Meridian 

90

Degree Day 65 

5561.0

Shallow Well Water Temperature (deg. F) 

56

SSF rule-of-thumb 

Lo

Hi

Solar collection area as a percent
of floor area (Ag / Af)

.14

.28

Heat Load Reduction (no night insulation) 

15

21

Heat Load Reduction (R9 night insulation) 

37

60

Prevailing Wind Direction in Summer 
(N, NNE, NE, ESE. E, ...) 

SW

Associated Wind Speed 

7

Input for # of days 

10

Abbreviated Climate for Individual Days

Notes:

   

DAY 1 of 10 

DAY NAME 

Winter Cloudy

typ

Month 

December

Cloud Cover (in tenths) 

0

Sky 

Cloudy

Temp. in deg. F. 

Max = 39

Min = 23

Wind Speed (mph) 

10

Wind Direction (eg. ENE) 

SW

Rel. Humidity in % 

Max = 83

Min = 70

Radiation Daily Total in BTU (Total Horiz.) 

420

Multiplication Factor for wind speed 

default = 0.5 

DAY 2 of 10  

DAY NAME 

Winter Clear

non-typ

Month 

December

Cloud Cover (in tenths) 

0

Sky 

Clear 

Temp. in deg. F. 

Max = 39

Min = 23

Wind Speed (mph) 

10

Wind Direction (eg. ENE) 

SW

Rel. Humidity in % 

Max = 83

Min = 70

Radiation Daily Total in BTU (Total Horiz.) 

620

Multiplication Factor for wind speed 

default = 0.5 

DAY 3 of 10  

DAY NAME 

Spring Cloudy

typ

Month 

March

Cloud Cover (in tenths) 

0

Sky 

Cloudy 

Temp. in deg. F. 

Max = 50

Min = 31

Wind Speed (mph) 

12

Wind Direction (eg. ENE) 

WNW

Rel. Humidity in % 

Max = 79

Min = 59

Radiation Daily Total in BTU (Total Horiz.) 

1010

Multiplication Factor for wind speed 

default = 0.5 

DAY 4 of 10  

DAY NAME 

Spring Clear

non-typ

Month 

March

Cloud Cover (in tenths) 

0

Sky 

Clear 

Temp. in deg. F. 

Max = 50

Min = 31

Wind Speed (mph) 

12

Wind Direction (eg. ENE) 

WNW

Rel. Humidity in % 

Max = 79

Min = 59

Radiation Daily Total in BTU (Total Horiz.) 

1310

Multiplication Factor for wind speed 

default = 0.5

DAY 5 of 10  

DAY NAME 

Summer Cloudy

non-typ

Month 

June

Cloud Cover (in tenths) 

0

Sky 

Cloudy 

Temp. in deg. F. 

Max = 82

Min = 61

Wind Speed (mph) 

8

Wind Direction (eg. ENE) 

SW

Rel. Humidity in % 

Max = 80

Min = 53

Radiation Daily Total in BTU (Total Horiz.) 

1860

Multiplication Factor for wind speed 

default = 0.5 

DAY 6 of 10 

DAY NAME 

Summer Clear

typ

Month 

June

Cloud Cover (in tenths) 

0

Sky 

Clear 

Temp. in deg. F. 

Max = 82

Min = 61

Wind Speed (mph) 

8

Wind Direction (eg. ENE) 

SW

Rel. Humidity in % 

Max = 80

Min = 53

Radiation Daily Total in BTU (Total Horiz.) 

2430

Multiplication Factor for wind speed 

default = 0.5 

DAY 7 of 10

DAY NAME 

Fall Cloudy

non-typ

Month 

September

Cloud Cover (in tenths) 

0

Sky 

Cloudy 

Temp. in deg. F. 

Max = 78

Min = 55

Wind Speed (mph) 

8

Wind Direction (eg. ENE) 

SW

Rel. Humidity in % 

Max = 87

Min = 53

Radiation Daily Total in BTU (Total Horiz.) 

1280

Multiplication Factor for wind speed 

default = 0.5 

DAY 8 of 10  

DAY NAME 

Fall Clear

typ

Month 

September

Cloud Cover (in tenths) 

0

Sky 

Clear 

Temp. in deg. F. 

Max = 78

Min = 55

Wind Speed (mph) 

8

Wind Direction (eg. ENE) 

SW

Rel. Humidity in % 

Max = 87

Min = 53

Radiation Daily Total in BTU (Total Horiz.) 

1630

Multiplication Factor for wind speed 

default = 0.5 

DAY 9 of 10

DAY NAME 

Winter 2.5% Design Day

Extreme

Month 

January

Cloud Cover (in tenths) 

0

Sky 

Clear

Temp. in deg. F. 

Max = 22

Min = 2

Wind Speed (mph) 

12.5

Wind Direction (eg. ENE) 

NNW

Rel. Humidity in % 

Max = 91

Min = 62

Radiation Daily Total in BTU (Total Horiz.) 

754.14

Multiplication Factor for wind speed 

.54

DAY 10 of 10 

DAY NAME 

Summer 2.5% Design Day

Extreme

Month 

July

Cloud Cover (in tenths) 

0

Sky 

 Clear

Temp. in deg. F. 

Max = 90

Min = 68

Wind Speed (mph) 

3.1

Wind Direction (eg. ENE) 

S|SW

Rel. Humidity in % 

Max = 91

Min = 53

Radiation Daily Total in BTU (Total Horiz.) 

2337.56

Multiplication Factor for wind speed 

.54

NOTE: To down load 24 hour data, for the extreme days above, see 24 hour data.

SOURCES: Except as noted , data is taken from the following source. For bibliographic references, see Sources for Climate Information.