Montana Fall Weather Report

Madison River Fishing Report, Fly Fishing Montana, Best Trout Rivers in the US, MRFC, Fly fishing, Fly fishing Montana

Every month we receive a monthly weather update courtesy of Tom Dimeola.  Tom does a great job keeping track of weather trends in the Madison Valley in comparison to the past years. We've compiled the last few months and will be putting these out seasonally so that you can follow along with us and Tom and see just how much the weather impacts everything, especially fishing, in the Madison Valley.  Feel free to reach out to us if you have anything that you'd like to add to these reports or if you have any questions for us.  Email - flyshop@mrfc.com 

JUNE

Wow, what an interesting month!  We only had 0.06 inches of rain measured in town. The 19 year average is 1.93 inches and the previous lowest on record was 0.77 inches  in 2012. The mean high was astounding with an average of 83.30 degrees which is 9 degrees above the 19 year average. The 7 days with temperatures above 90 degrees ties the 19 year record from 2016.

Some amazing highlights,

  • 0.06 inches of precipitation versus the 19 year average of 1.93 inches.
  • Only 2 precipitation days versus the 19 year average of 10.79 days.
  • 16 days with winds over 30 mph.
  • The mean high of 83.30 degrees was 9.17 degrees above the 19 year average of 74.13 degrees. This is astonishing!
  • The mean average temperature of 65.24 degrees was 5.10 degrees above the 19 year average of 59.14 degrees.
  • The mean low temperature of 47.17 was 3.02 degrees above the 19 year average of 44.15 degrees.
  • 7 days above 90 degrees ties 2015 for the most days 90 or above in the 19 years of my records.
JULY
It was a warm month with the mean low, mean high and mean average temperatures all substantially above the 19 year averages. The 18 days above 90 degrees was almost 8 days above the average and was the second highest total in my records, (there were 22 days above 90 in 2007). With the late July rains the precipitation for the month was above the 19 year average, 1.22 inches vs 1.09 inches. The 1.22 inches of precipitation in July helped but we are still woefully behind our average annual rain for this date. If we average historical rain totals for the remaining 5 months of 2021 we will once again be under 10 inches of precipitation for the 2nd consecutive year.

Highlights,
  • The mean Average temperature was 3.58 degrees above the 19 year average of 67.79.   71.37 vs 67.79 degrees.
  • The mean Low temperature was almost  3.0 degrees above the 19 year average of 49.92.   52.84 vs 49.92 degrees.
  • The mean High temperature was 4.24 degrees above the 19 year average of 85.66.   89.90 vs 85.66 degrees.
  • Precipitation for the month was 1.22 inches vs the 19 year average of 1.09 inches.
  • 18 days above 90 degrees vs the 19 year average of 10.47 days.
AUGUST
Thankfully we received much needed moisture in August.  The 1.93 inches of rain was almost double the 19 year average of 1.03 inches and we are within 0.35 inches of last year’s total rainfall of 7.86 inches.  We were at the 19 year average in number of days above 90 degrees at 6. The mean Average temperature was below average, the mean Low temperature was above average and the mean High average of 79.65 degrees was almost 3 degrees cooler than the 19 year average of 82.53.  Go figure!

Highlights,
  • 1.93 inches of rain was almost double the 19 year average of 1.03 inches.
  • The mean High average of 79.65 degrees was almost 3 degrees cooler than the 19 year average of 82.53.
  • 6 days above 90 degrees vs the 19 year average of 5.84 days.
SEPTEMBER
September, 2021 was the driest September I have ever recorded with only 0.04 inches of precipitation vs the 19 year average of 0.98 inches and only 2 precipitation days vs the 19 year average of 6.63 days. The mean high temperature of 76.43 degrees was substantially above the average of 72.46 degrees while the mean average of  58.70 degrees was 2.1 degrees above the 19 year average of 56.60 degrees, the mean low was at average. The number of freezing days and the number of days over 90 were both above normal.

 
Highlights,

  • 0.04 inches of precipitation vs the 19 year average of 0.98 inches.
  • 2 precipitation days vs the 19 year average of 6.63 days.
  • The mean average temperature of 58.70 degrees was 2.1 inches higher than the 19 year average of 56.60 degrees.
  • The mean high temperature of 76.43 degrees was 3.97 above the 19 year average of 72.46 degrees.
  • The 51 mph wind gust on 9/18 was the highest wind gust I have ever recorded in September.
  • 5 days freezing or below vs the 19 year average of 3.53 days.
  • 2 days above 90 degrees vs the 19 year average of 0.84 days.
    OCTOBER
    No need to remind everyone but October, 2021 with 20 days was the most days with winds over 30 mph in my 19 years of records.  Precipitation was above normal and probably the most unusual stat is that the lowest temperature recorded in October was only 28 degrees which is the warmest low temperature in my 19 years of records.


    Highlights,

    • 20 days with wind gusts over 30 mph.
    • Precipitation of 1.87 inches was substantially above the 19 year average of 1.09 inches.
    • The mean low for October of 36.19 degrees was over 3.5 degrees higher than the 19 year average of 32.51 degrees.
    • 28 degrees for the coldest temperature of the month was the warmest October “low” in my 19 years of records.
    • 13 days freezing or below was below the 19 year average of 15.58 days.

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