Western and Central Wyoming

Weather Forecast Office

Lander 2017 Annual Climate Summary

Lander Climate Summary Banner

...Highlights of 2017...

Notice: The Lander observations were not available from August 1st through September 23rd during the reconstruction of Lander's Hunt Field runway. Data for this period is missing for the annual summary, but may be restored by the National Centers for Environmental Information (NCEI) at a later date.

Annual - 94.2 inches of snowfall was 103 percent of normal, the peak wind gust for 2017 was 76 mph on June 12th.
Seasonal: Wettest January-April period on 126 years of record (1892-2017) with 10.29" of precipitation. 4th wettest Spring (March, April, May) on record.
Monthly Temperatures: 18th coldest January, 5th warmest March on record.
Monthly Precipitation: 4th wettest January (1.27" of precipitation), wettest March on record (4.65" of precipitation).
Monthly Snowfall: 8th snowiest January on record with18.3" of snowfall.
Daily Precipitation: 2.71" of precipitation on March 31st was the highest daily total ever recorded in March, and the 6th highest daily total on the entire period of record.

Temperature

Precipitation

Snowfall

Wind

Temperature Banner

Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Average High	22.2	39.0	54.0	53.9	65.1	79.1	89.0	M	M	58.1	49.4	33.8	M
Mean High (1981-2010 Normals)	33.1	36.5	47.4	56.4	66.5	77.5	86.8	85.0	72.8	58.5	42.8	31.8	58.0
Average Low	2.3	17.1	29.5	31.0	39.7	48.4	56.4	M	M	29.4	25.1	10.2	M
Mean Low (1981-2010 Normals)	10.2	13.9	23.6	31.3	40.1	48.4	55.6	54.3	44.4	32.7	19.7	9.6	32.1
Average Temperature	12.2	28.1	41.8	42.4	52.4	63.8	72.7	M	M	43.8	37.3	22.0	M
Mean Temp (1981-2010 Normals)	21.7	25.2	35.5	43.9	53.3	63.0	71.2	69.6	58.6	45.6	31.2	20.7	45.1
Departure from Normal	-9.5	2.9	6.3	-1.5	-0.9	0.8	1.5	M	M	-1.8	6.1	1.3	M
Rank: Coldest to Warmest 126 years of record (P.O.R 1892-2017)	18	91	122	59	61	89	103	M	M	36	115	69	M

Highest Daily Maximum	48	59	72	75	80	93	95	M	M	75	68	56	95
Date of Occurrence	9	9	18	13	12	20	5,20	M	M	25	23	3	7/5,20
Lowest Daily Minimum	-25	-5	7	20	30	40	47	M	M	17	15	-10	-25
Date of Occurrence	6	3	1	5	19	24	1	M	M	31	8	24	1/6
Number of Days with:
Maximum >= 90°	0	0	0	0	0	3	17	M	M	0	0	0	20*
Maximum <= 32°	25	9	1	0	0	0	0	0	M	0	1	11	47
Minimum <= 32°	31	26	16	18	4	0	0	0	M	23	27	31	176*
Minimum <= 0°	14	5	0	0	0	0	0	0	0	0	0	8	27
Record High Maximums Set or Tied	0	0	1	0	0	0	0	M	M	0	1	0	2
Record Low Maximums Set or Tied	0	0	0	0	1	0	0	M	M	0	0	0	1
Record Low Minimums Set or Tied	0	0	0	0	0	0	0	M	M	0	0	0	0
Record High Minimums Set or Tied	0	1	0	0	0	0	0	M	M	0	2	0	3
* Number of Days is missing most of the data from August and September

Temperature Ranks and Records:

Daily Records:

Record High Temperatures:

March: 72 on the 18th.
November: 68* on the 23rd. (*Also a record high so late in the season)

Record Low Maximum Temperatures:

May: 37 on the 18th.

Record Low Temperatures:

Month: -33 on the 6th.

Record High Minimum Temperatures:

February: 37 on the 10th (tie).
November: 36 on the 18th (tie), 31 on the 27th (tie).

Warmest Months of March on Record
Rank	Year	Average Temperature °F
1	2012	44.2
2	1986	44.1
3	1910	43.0
4	2007	42.2
5	2017	41.8
6	1992, 1918	41.6
8	1972	40.9
9	2015	40.0
10	1934	39.4

Top Ten Warmest Years on Record
Rank	Year	Average Temperature °F
1	2012	49.0
2	1988, 1981	47.7
4	1934	47.6
5	1994	47.5
6	2006	47.4
7	1954	47.2
8	1999	47.0
9	2015	46.9
10	2016, 2007, 1990	46.6

Top Ten Coldest Years on Record
Rank	Year	Average Temperature °F
1	1912	39.9
2	1944	40.1
3	1920	40.2
4	1916, 1898	40.9
6	1895	41.0
7	1924	41.1
8	1913, 1899, 1923	41.2


Average Annual Temperature for Period of Record - Click on Graph to Enlarge

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Precipitation Banner

Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total (inches)	1.27	1.11	4.65	3.26	2.20	0.26	0.43	M	M	1.07	0.45	1.23	M
Mean Precip (1981-2010 Normals)	0.41	0.58	1.16	1.87	2.20	1.27	0.78	0.61	1.05	1.29	0.86	0.58	12.66
Departure from Normal	0.86	0.53	3.49	1.39	0.00	-1.01	-0.35	M	M	-0.22	-0.41	0.65	M
Percent of Normal	310	191	401	174	100	20	55	M	M	83	52	212	M
Rank - Driest to Wettest 126 years (P.O.R 1892-2017)	123	102	126	103	69	27	54	M	M	64	46	111	M

Greatest 24-HR Total	0.81	0.66	2.71	0.94	1.38	0.17	0.24	M	M	0.35	0.20	0.33	2.71
Dates of Occurrence	23-24	23-24	31	28	18	11	20	M	M	14	1	20	3/31
Number of Days with:
Precipitation >= 0.01	7	6	9	10	8	4	6	M	M	6	8	7	71*
Precipitation >= 0.10	4	2	5	7	5	1	2	M	M	4	2	6	38*
Precipitation >= 1.00	0	0	2	0	1	0	0	M	M	0	0	0	3
Days with Thunderstorms	0	0	1	1	6	7	11	3*	M	2	0	0	31*
Daily Precipitation Records Set or Tied	1	0	1	0	1	0	0	M	M	0	0	0	3

M - Extensive missing data for August and September; Annual Totals Cannot be Calculated

Precipitation Ranks and Records:

One Day Precipitation Records:

January: 0.46" on the 23rd.
March: 2.71" on the 31st (also an all-time daily record for March and 6th highest daily total for the entire period of record)
May: 1.38" on the 18th.

Wettest Months of January on Record
Rank	Year	Precipitation (inches)
1	1910	2.06
2	1949	1.65
3	1962	1.34
4	2017	1.27
5	1963, 1922	1.13
7	1994	1.10
9	1972, 1920	1.08

Wettest Months of March on Record
Rank	Year	Precipitation (inches)
1	2017	4.65
2	2016	4.59
3	1906	3.56
4	1998	3.44
5	1977	3.30
6	1894	3.29
7	1973	3.02
8	1898	2.73
9	1941	2.68
10	1896	2.63

Wettest Springs (March, April, May) on Record
Rank	Year	Precipitation (inches)
1	2016	14.23
2	1957	12.57
3	1971	11.02
4	2017	10.11
5	1924	9.95
6	1898	9.83
7	1944	9.67
8	1995	9.40
9	1906	9.34
10	1935	9.33

Top Ten Driest Years on Record
Rank	Year	Precpitation (inches)
1	2001	5.30
2	1954	5.37
3	2012	6.60
4	1902	7.25
5	2006	7.42
6	1988	7.63
7	1939	7.95
8	2002	8.09
9	1914	8.32
10	2000	8.61

Top Ten Wettest Years on Record
Rank	Year	Precipitation (inches)
1	1957	21.89
2	1923	21.56
3	2016	21.29
4	1941	20.66
5	1912	20.00
6	1947	19.70
7	1995	19.68
8	1944	19.57
9	1973	19.30
10	1908	19.22


Annual Precipitation for Period of Record - Click on Graph to Enlarge

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Snow Banner

Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Total (inches)	18.3	19.6	5.7	17.4	6.8	0.0	0.0	0.0	0.0	4.5	3.5	18.4	94.2
Average Snowfall	7.6	10.3	16.1	16.8	4.8	0.1	0.0	0.0	2.7	9.8	13.1	10.1	91.4
Departure from Normal	10.7	9.3	-10.4	0.6	2.0	-0.1	0.0	0.0	-2.7	-5.3	-9.6	8.3	2.8
Percent of Normal	241	190	35	104	142	0	0	0	0	46	27	182	103
Rank - Least to Most 126 Years (P.O.R 1892-2017)	119	109	23	72	89	NA	NA	NA	1*	59	28	114	82

Greatest 24-HR Total	5.4	13.9	5.7	10.7	6.3	0.0	0.0	0.0	0.0	2.6	2.6	4.2	13.9
Dates of Occurrence	23	23	31	4	18	NA	NA	NA	NA	14	2	20	2/23
Number of Days with:
Snowfall >= 1.0 inch	4	4	1	2	1	0	0	0	0	2	1	7	22
Daily Snowfall Records Set or Tied	1	0	0	0	1	0	0	0	0	0	0	0	2
* 63 months of September and 16 months of Octobers on record with no snowfall.

Snowfall Ranks and Records:

One Day Snowfall Records (inches):

January: 5.4" on the 23rd.
May: 6.3" on the 18th.

Snowiest Months of January on Record
Rank	Year	Snowfall (inches)
1	1962	26.5
2	1980	26.2
3	1973	25.7
4	1949	23.9
5	1910	20.6
6	1994	19.5
7	1972	18.7
8	2017	18.3
9	1984	18.0
10	1963	17.8

Top Ten Snowiest Years on Record
Rank	Year	Snowfall (inches)
1	1973	199.9
2	1975	160.7
3	1983	159.6
4	1967	154.6
5	1959	150.4
6	1971	148.3
7	2013	138.0
8	1978	128.1
9	1920	127.9
10	1892	125.1
44	2017	94.2



Annual and Seasonal Snowfall for Period of Record - Click on Graph to Enlarge

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Wind Banner

Element	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Average Speed (MPH)	4.0	6.7	8.3	7.2	6.9	7.5	6.5	M	M	6.1	6.3	4.7	6.4
Maximum 3-sec Gust	58	56	70	52	53	76	63	M	M	44	59	49	76
Direction (degrees)	230	260	200	250	240	220	270	M	M	210	230	210	220
Date of Occurrence	10	6	5	17	24	12	17	M	M	20	16	3	6/12

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