Weather in Heron Lake, MN
Heron Lake, Sunday, 9 August, 00:54
Mostly clear. Feels like 69°. High 81°, low 65°.
Monthly outlook for Heron Lake, MN: average high 85.5°, average low 59.7°. That is 3.9° above the climate normal for August. Precipitation is expected on 5 days (about 0.6 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 18 August (95.2°), the coolest 21 August (50.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 86.5° | 78.4° | +4.5° |
| 19 August – 28 August | 83.8° | 78.4° | +3° |
| 29 August – 7 September | at normal | 77° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Dundee (8 mi).
0.03
Heron Lake, Monday, 10 August
Light rain. High 94°, low 66°.
0.2Heron Lake, Tuesday, 11 August
Rain. High 87°, low 63°.
0
Heron Lake, Wednesday, 12 August
Partly cloudy. High 85°, low 64°.
0.02Heron Lake, Thursday, 13 August
Light rain. High 78°, low 58°.
0
Heron Lake, Friday, 14 August
Overcast. High 83°, low 57°.
0Heron Lake, Saturday, 15 August
Overcast. High 80°, low 59°.
0Heron Lake, Sunday, 16 August
Overcast. High 90°, low 56°.
0.02Heron Lake, Monday, 17 August
Light rain. High 91°, low 64°.
0Heron Lake, Tuesday, 18 August
Light rain. High 95°, low 67°.
0.05Heron Lake, Wednesday, 19 August
Light rain. High 78°, low 58°.
0.07Heron Lake, Thursday, 20 August
Light rain. High 70°, low 55°.
0Heron Lake, Friday, 21 August
Partly cloudy. High 84°, low 50°.
0.08Heron Lake, Saturday, 22 August
Light rain. High 92°, low 58°.
0
Heron Lake, Sunday, 23 August
Clear. High 86°, low 56°.
0.1Heron Lake, Monday, 24 August
Light rain. High 94°, low 60°.
0.11Heron Lake, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15
Heron Lake, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.09Heron Lake, Thursday, 27 August
Climate normal for this date — 60-year average.
0.1Heron Lake, Friday, 28 August
Climate normal for this date — 60-year average.
0.05Heron Lake, Saturday, 29 August
Climate normal for this date — 60-year average.
0.1Heron Lake, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09Heron Lake, Monday, 31 August
Climate normal for this date — 60-year average.
0.05Heron Lake, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Heron Lake, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.08Heron Lake, Thursday, 3 September
Climate normal for this date — 60-year average.
0.14Heron Lake, Friday, 4 September
Climate normal for this date — 60-year average.
0.06Heron Lake, Saturday, 5 September
Climate normal for this date — 60-year average.
0.06
Heron Lake, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09Heron Lake, Monday, 7 September
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Heron Lake, MN are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Heron Lake, MN since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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