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St. Helena Weather in 1978

Historical record of St. Helena, California weather for the year 1978 based on NOAA data.
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1978 St. Helena Weather Extremes
Highest temperature 106 °F August 5
Lowest temperature 22 °F December 30
Highest daily low 61 °F August 6
Lowest daily high 48 °F January 30
Most daily precipitation 2.6 inches January 16
Most daily snow none -
Total annual precipitation 36.9 inches -
Total annual snow none -
What was the hottest temperature in St. Helena in 1978?
The highest temperature recorded in St. Helena, California in 1978 was 106 °F which happened on August 5.
Highest Temperatures: All-Time By Year
Highest Temperatures in St. Helena in 1978
Rank Temperature Date
1 106 °F Aug 5
2 105 °F Aug 6
3 102 °F Jun 6
4 101 °F Sep 24
4 101 °F Jul 31
4 101 °F Jun 5
7 100 °F Jul 24
7 100 °F Jul 8
7 100 °F May 29
10 99 °F Sep 29
10 99 °F Sep 23
10 99 °F Jul 21
10 99 °F Jul 19
10 99 °F Jul 18
10 99 °F Jul 16
10 99 °F Jun 8
10 99 °F Jun 4
What was the coldest temperature in St. Helena in 1978?
The lowest temperature recorded in St. Helena, California in 1978 was 22 °F which happened on Dec 30.
Lowest Temperatures: All-Time By Year
Lowest Temperatures in St. Helena in 1978
Rank Temperature Date
1 22 °F December 30
2 23 °F December 20
3 24 °F December 31
3 24 °F December 16
3 24 °F November 12
6 25 °F November 15
7 27 °F December 26
7 27 °F December 25
7 27 °F December 23
7 27 °F December 21
January 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
January 1
 58 39 n/a
January 2
 54 42 n/a
January 3
 53 45 0.56
January 4
 52 49 2.50
January 5
 55 44 n/a
January 6
 56 49 n/a
January 7
 68 43 0.00
January 8
 57 40 2.10
January 9
 58 52 1.84
January 10
 64 44 0.05
January 11
 60 43 0.03
January 12
 56 43 0.70
January 13
 55 42 0.43
January 14
 54 51 1.55
January 15
 56 42 1.85
January 16
 58 50 2.56
January 17
 59 46 0.45
January 18
 57 44 0.22
January 19
 57 49 0.63
January 20
 62 39 0.02
January 21
 56 42 0.00
January 22
 59 32 0.00
January 23
 59 34 0.00
January 24
 63 31 0.00
January 25
 60 34 0.00
January 26
 65 34 0.00
January 27
 62 34 0.00
January 28
 62 35 0.00
January 29
 63 35 0.00
January 30
 48 38 0.02
January 31
 51 44 0.00
February 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
February 1
 50 44 0.20
February 2
 61 49 0.19
February 3
 61 38 0.01
February 4
 60 42 0.00
February 5
 56 46 1.25
February 6
 60 50 1.23
February 7
 60 50 1.65
February 8
 54 40 0.55
February 9
 55 39 0.76
February 10
 53 39 0.00
February 11
 56 31 0.00
February 12
 58 40 1.05
February 13
 60 46 0.30
February 14
 61 34 0.00
February 15
 60 39 0.00
February 16
 53 36 0.05
February 17
 56 39 0.00
February 18
 72 35 0.00
February 19
 66 38 0.01
February 20
 61 40 0.00
February 21
 74 39 0.00
February 22
 75 40 0.00
February 23
 72 42 0.00
February 24
 64 43 0.00
February 25
 59 42 0.00
February 26
 61 42 0.00
February 27
 62 40 0.00
February 28
 70 33 0.00
March 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
March 1
 60 46 0.30
March 2
 59 51 0.90
March 3
 60 51 0.61
March 4
 62 52 1.75
March 5
 62 51 0.62
March 6
 58 40 0.00
March 7
 68 44 0.00
March 8
 62 52 1.05
March 9
 62 49 0.22
March 10
 66 39 0.00
March 11
 62 42 0.03
March 12
 67 36 0.16
March 13
 66 38 0.01
March 14
 70 39 0.00
March 15
 75 38 0.00
March 16
 80 39 0.00
March 17
 82 41 0.00
March 18
 78 45 0.00
March 19
 74 45 0.00
March 20
 71 41 0.00
March 21
 67 51 0.00
March 22
 71 54 0.24
March 23
 65 52 0.10
March 24
 70 38 0.00
March 25
 72 41 0.00
March 26
 75 45 0.00
March 27
 74 49 0.00
March 28
 70 50 0.00
March 29
 67 50 0.02
March 30
 72 51 0.01
March 31
 67 55 0.66
April 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
April 1
 61 50 0.10
April 2
 64 37 0.03
April 3
 60 40 0.02
April 4
 62 39 0.59
April 5
 58 37 0.02
April 6
 55 44 0.80
April 7
 60 35 0.03
April 8
 74 40 0.00
April 9
 88 42 0.00
April 10
 86 44 0.00
April 11
 80 45 0.00
April 12
 74 45 0.00
April 13
 70 45 0.00
April 14
 61 42 0.02
April 15
 54 47 1.08
April 16
 60 35 0.15
April 17
 64 34 0.00
April 18
 67 36 0.00
April 19
 62 40 0.06
April 20
 62 42 0.16
April 21
 66 34 0.01
April 22
 62 35 0.00
April 23
 72 38 0.00
April 24
 66 50 0.21
April 25
 61 49 0.02
April 26
 70 50 0.01
April 27
 74 42 0.00
April 28
 75 44 0.00
April 29
 74 46 0.00
April 30
 71 44 0.00
May 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
May 1
 81 45 0.00
May 2
 89 49 0.00
May 3
 85 54 0.00
May 4
 80 51 0.00
May 5
 70 48 0.00
May 6
 80 54 0.00
May 7
 85 46 0.00
May 8
 87 49 0.00
May 9
 81 48 0.00
May 10
 76 49 0.00
May 11
 73 48 0.00
May 12
 85 44 0.00
May 13
 85 50 0.00
May 14
 66 49 0.00
May 15
 66 51 0.05
May 16
 79 40 0.04
May 17
 85 50 0.00
May 18
 90 48 0.00
May 19
 91 50 0.00
May 20
 83 51 0.00
May 21
 82 50 0.00
May 22
 76 49 0.00
May 23
 72 43 0.00
May 24
 69 47 0.00
May 25
 71 41 0.00
May 26
 76 42 0.00
May 27
 90 46 0.00
May 28
 95 53 0.00
May 29
 100 52 0.00
May 30
 94 52 0.00
May 31
 91 52 0.00
June 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
June 1
 75 54 0.00
June 2
 80 53 0.00
June 3
 86 52 0.00
June 4
 99 57 0.00
June 5
 101 53 0.00
June 6
 102 53 0.00
June 7
 91 54 0.00
June 8
 99 53 0.00
June 9
 88 52 0.00
June 10
 82 56 0.00
June 11
 84 51 0.00
June 12
 78 50 0.00
June 13
 81 56 0.00
June 14
 82 51 0.00
June 15
 83 50 0.00
June 16
 84 49 0.00
June 17
 90 47 0.00
June 18
 81 52 0.00
June 19
 86 50 0.00
June 20
 80 45 0.00
June 21
 85 50 0.00
June 22
 82 52 0.00
June 23
 87 52 0.00
June 24
 82 47 0.00
June 25
 84 51 0.00
June 26
 87 52 0.00
June 27
 70 55 0.00
June 28
 73 56 0.00
June 29
 79 56 0.00
June 30
 80 51 0.00
July 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
July 1
 80 51 0.00
July 2
 81 52 0.00
July 3
 84 40 0.00
July 4
 88 50 0.00
July 5
 93 53 0.00
July 6
 89 51 0.00
July 7
 81 54 0.00
July 8
 100 52 0.00
July 9
 90 61 0.00
July 10
 77 54 0.00
July 11
 77 55 0.00
July 12
 82 50 0.00
July 13
 98 50 0.00
July 14
 96 52 0.00
July 15
 90 53 0.00
July 16
 99 53 0.00
July 17
 98 54 0.00
July 18
 99 57 0.00
July 19
 99 52 0.00
July 20
 92 52 0.00
July 21
 99 52 0.00
July 22
 91 56 0.00
July 23
 89 54 0.00
July 24
 100 52 0.00
July 25
 91 53 0.00
July 26
 91 56 0.00
July 27
 85 52 0.00
July 28
 86 50 0.00
July 29
 90 52 0.00
July 30
 91 52 0.00
July 31
 101 52 0.00
August 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
August 1
 87 52 0.00
August 2
 87 53 0.00
August 3
 90 51 0.00
August 4
 93 55 0.00
August 5
 106 55 0.00
August 6
 105 61 0.00
August 7
 98 55 0.00
August 8
 98 52 0.00
August 9
 94 n/a 0.00
August 10
 85 55 0.00
August 11
 84 52 0.00
August 12
 81 54 0.00
August 13
 84 54 0.00
August 14
 76 52 0.00
August 15
 88 55 0.00
August 16
 85 55 0.00
August 17
 89 46 0.00
August 18
 94 49 0.00
August 19
 93 46 0.00
August 20
 91 48 0.00
August 21
 79 49 0.00
August 22
 80 47 0.00
August 23
 77 46 0.00
August 24
 77 48 0.00
August 25
 80 53 0.00
August 26
 89 52 0.00
August 27
 90 57 0.00
August 28
 95 51 0.00
August 29
 88 53 0.00
August 30
 90 53 0.00
August 31
 90 50 0.00
September 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
September 1
 94 53 0.00
September 2
 91 54 0.00
September 3
 89 57 0.00
September 4
 80 57 0.00
September 5
 72 50 0.00
September 6
 75 52 0.00
September 7
 79 46 0.00
September 8
 82 48 0.00
September 9
 65 51 0.86
September 10
 72 52 0.37
September 11
 82 52 0.00
September 12
 85 50 0.00
September 13
 85 49 0.00
September 14
 85 51 0.00
September 15
 89 50 0.00
September 16
 89 52 0.00
September 17
 85 53 0.00
September 18
 74 47 0.00
September 19
 78 48 0.00
September 20
 85 44 0.00
September 21
 87 43 0.00
September 22
 89 45 0.00
September 23
 99 48 0.00
September 24
 101 55 0.00
September 25
 96 55 0.00
September 26
 80 49 0.00
September 27
 85 49 0.00
September 28
 93 49 0.00
September 29
 99 52 0.00
September 30
 96 52 0.00
October 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
October 1
 94 50 0.00
October 2
 97 49 0.00
October 3
 97 49 0.00
October 4
 91 50 0.00
October 5
 77 49 0.00
October 6
 76 49 0.00
October 7
 77 42 0.00
October 8
 86 43 0.00
October 9
 81 49 0.00
October 10
 90 44 0.00
October 11
 94 47 0.00
October 12
 98 46 0.00
October 13
 98 57 0.00
October 14
 90 50 0.00
October 15
 91 50 0.00
October 16
 80 51 0.00
October 17
 82 52 0.00
October 18
 74 52 0.00
October 19
 70 46 0.00
October 20
 71 46 0.00
October 21
 84 43 0.00
October 22
 85 42 0.00
October 23
 91 46 0.00
October 24
 82 42 0.00
October 25
 73 42 0.00
October 26
 74 43 0.00
October 27
 72 38 0.00
October 28
 72 40 0.00
October 29
 72 41 0.00
October 30
 69 40 0.00
October 31
 61 37 0.00
November 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
November 1
 68 34 0.00
November 2
 75 34 0.00
November 3
 77 36 0.00
November 4
 75 36 0.00
November 5
 81 38 0.00
November 6
 81 38 0.00
November 7
 84 39 0.00
November 8
 84 39 0.00
November 9
 72 42 0.00
November 10
 61 42 0.00
November 11
 61 40 0.00
November 12
 54 24 0.37
November 13
 61 31 0.00
November 14
 62 29 0.00
November 15
 59 25 0.00
November 16
 57 44 0.00
November 17
 68 33 0.00
November 18
 56 38 0.03
November 19
 53 41 0.48
November 20
 58 50 0.59
November 21
 55 45 0.31
November 22
 53 42 0.30
November 23
 65 40 0.00
November 24
 67 39 0.00
November 25
 65 32 0.00
November 26
 66 31 0.00
November 27
 63 30 0.00
November 28
 65 33 0.00
November 29
 66 40 0.00
November 30
 60 39 0.00
December 1978 St. Helena Weather
Day High (°F) Low (°F) Precip. (inches)
December 1
 63 37 0.10
December 2
 65 33 0.00
December 3
 68 29 0.00
December 4
 64 31 0.00
December 5
 55 40 0.00
December 6
 52 28 0.00
December 7
 52 31 0.00
December 8
 56 29 0.00
December 9
 58 29 0.00
December 10
 56 30 0.00
December 11
 63 31 0.00
December 12
 56 32 0.00
December 13
 69 34 0.00
December 14
 68 31 0.00
December 15
 68 31 0.00
December 16
 61 24 0.00
December 17
 53 43 0.35
December 18
 52 42 0.26
December 19
 55 28 0.00
December 20
 52 23 0.00
December 21
 52 27 0.00
December 22
 58 29 0.00
December 23
 52 27 0.00
December 24
 53 28 0.00
December 25
 52 27 0.00
December 26
 52 27 0.00
December 27
 50 29 0.00
December 28
 57 31 0.00
December 29
 58 29 0.00
December 30
 57 22 0.00
December 31
 61 24 0.00
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