<Table> <Tr> <Th_colspan="14"> (show) Climate data for Yellowstone Lake, elev . 7,870 feet (2,399 m) </Th> </Tr> <Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Record high ° F (° C) </Th> <Td> 46 (8) </Td> <Td> 56 (13) </Td> <Td> 61 (16) </Td> <Td> 65 (18) </Td> <Td> 78 (26) </Td> <Td> 83 (28) </Td> <Td> 92 (33) </Td> <Td> 91 (33) </Td> <Td> 83 (28) </Td> <Td> 72 (22) </Td> <Td> 63 (17) </Td> <Td> 48 (9) </Td> <Td> 92 (33) </Td> </Tr> <Tr> <Th> Average high ° F (° C) </Th> <Td> 24.4 (− 4.2) </Td> <Td> 28.0 (− 2.2) </Td> <Td> 36.2 (2.3) </Td> <Td> 43.3 (6.3) </Td> <Td> 51.9 (11.1) </Td> <Td> 61.6 (16.4) </Td> <Td> 71.6 (22) </Td> <Td> 71.4 (21.9) </Td> <Td> 61.6 (16.4) </Td> <Td> 47.8 (8.8) </Td> <Td> 33.5 (0.8) </Td> <Td> 24.3 (− 4.3) </Td> <Td> 46.4 (8) </Td> </Tr> <Tr> <Th> Average low ° F (° C) </Th> <Td> 1.2 (− 17.1) </Td> <Td> 1.2 (− 17.1) </Td> <Td> 9.2 (− 12.7) </Td> <Td> 18.0 (− 7.8) </Td> <Td> 28.0 (− 2.2) </Td> <Td> 35.4 (1.9) </Td> <Td> 41.6 (5.3) </Td> <Td> 39.9 (4.4) </Td> <Td> 31.8 (− 0.1) </Td> <Td> 23.7 (− 4.6) </Td> <Td> 13.8 (− 10.1) </Td> <Td> 5.0 (− 15) </Td> <Td> 20.8 (− 6.2) </Td> </Tr> <Tr> <Th> Record low ° F (° C) </Th> <Td> − 50 (− 46) </Td> <Td> − 50 (− 46) </Td> <Td> − 42 (− 41) </Td> <Td> − 26 (− 32) </Td> <Td> − 2 (− 19) </Td> <Td> 14 (− 10) </Td> <Td> 20 (− 7) </Td> <Td> 17 (− 8) </Td> <Td> − 5 (− 21) </Td> <Td> − 13 (− 25) </Td> <Td> − 30 (− 34) </Td> <Td> − 43 (− 42) </Td> <Td> − 50 (− 46) </Td> </Tr> <Tr> <Th> Average precipitation inches (mm) </Th> <Td> 1.65 (41.9) </Td> <Td> 1.61 (40.9) </Td> <Td> 1.80 (45.7) </Td> <Td> 1.78 (45.2) </Td> <Td> 2.47 (62.7) </Td> <Td> 2.25 (57.2) </Td> <Td> 1.62 (41.1) </Td> <Td> 1.60 (40.6) </Td> <Td> 1.46 (37.1) </Td> <Td> 1.18 (30) </Td> <Td> 1.85 (47) </Td> <Td> 1.63 (41.4) </Td> <Td> 20.90 (530.9) </Td> </Tr> <Tr> <Th> Average snowfall inches (cm) </Th> <Td> 34.3 (87.1) </Td> <Td> 30.4 (77.2) </Td> <Td> 25.6 (65) </Td> <Td> 21.4 (54.4) </Td> <Td> 8.1 (20.6) </Td> <Td> 1.3 (3.3) </Td> <Td> 0 (0) </Td> <Td> 0 (0) </Td> <Td> 1.3 (3.3) </Td> <Td> 9.9 (25.1) </Td> <Td> 30.9 (78.5) </Td> <Td> 30.5 (77.5) </Td> <Td> 193.7 (492) </Td> </Tr> <Tr> <Th> Average precipitation days (≥ 0.01 in) </Th> <Td> 16.8 </Td> <Td> 14.0 </Td> <Td> 13.7 </Td> <Td> 11.6 </Td> <Td> 11.5 </Td> <Td> 14.4 </Td> <Td> 11.0 </Td> <Td> 10.8 </Td> <Td> 9.7 </Td> <Td> 8.8 </Td> <Td> 13.1 </Td> <Td> 15.6 </Td> <Td> 151 </Td> </Tr> <Tr> <Th> Average snowy days (≥ 0.1 in) </Th> <Td> 16.2 </Td> <Td> 13.4 </Td> <Td> 12.6 </Td> <Td> 9.5 </Td> <Td> 4.4 </Td> <Td> 0.9 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 1.1 </Td> <Td> 5.8 </Td> <Td> 12.6 </Td> <Td> 14.9 </Td> <Td> 91.4 </Td> </Tr> <Tr> <Td_colspan="14"> Source #1: NOAA (normals, 1981--2010) </Td> </Tr> <Tr> <Td_colspan="14"> Source #2: The Weather Channel (Records) </Td> </Tr> </Table> <Tr> <Th_colspan="14"> (show) Climate data for Yellowstone Lake, elev . 7,870 feet (2,399 m) </Th> </Tr> <Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Record high ° F (° C) </Th> <Td> 46 (8) </Td> <Td> 56 (13) </Td> <Td> 61 (16) </Td> <Td> 65 (18) </Td> <Td> 78 (26) </Td> <Td> 83 (28) </Td> <Td> 92 (33) </Td> <Td> 91 (33) </Td> <Td> 83 (28) </Td> <Td> 72 (22) </Td> <Td> 63 (17) </Td> <Td> 48 (9) </Td> <Td> 92 (33) </Td> </Tr>

Where was the first public weather service established in 1869