Aurora Borealis in River Falls
United States · 44.86°, -92.62° · geomagnetic 53.5° · needs Kp 7
Tonight in River Falls
1%
Peak chance of a visible display tonight, from the same model the Revon app runs. River Falls needs Kp 7 to see anything at all, and tonight the forecast peaks at Kp 4.7. Short of the threshold, which is what most nights look like here.
Updated 2026-08-02 20:20 UTC
The next 30 nights in River Falls
Every night to come, scored the same way as tonight. The best of the open week is Sunday 2 Aug at 1%. Not one of the seven reaches the Kp 7 that River Falls needs, which is normal rather than unlucky — it averages 3.2 viable nights a year. The 23 nights past the seven-day window move with the 27-day solar rotation and are updated daily in the app.
Nights 8–30 unlock in the Revon app
See all 30 nights for River Falls
Revon aurora model over the NOAA Kp forecast and 27-day outlook
How often the aurora borealis reaches River Falls
3.2 nights a year, averaged across 10.0 years of records
| Storm level | Nights / year |
|---|---|
| Kp 4 | 83.4 |
| Kp 5 | 28.7 |
| Kp 6 | 9.3 |
| Kp 7 | 3.2 |
| Kp 8 | 1.2 |
NOAA planetary Kp, 2016-04-02 to 2026-03-30
Wait for an alert; do not book a week
At Kp 7, River Falls needs a severe geomagnetic storm before anything shows above the northern horizon. Storms that size arrive a handful of times per solar cycle and announce themselves a day or two ahead. Watching for one beats picking dates and hoping.
Hours of true darkness, month by month
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 11.4 | 10.3 | 8.9 | 7.0 | 4.9 | 3.4 | 4.1 | 6.2 | 8.2 | 9.9 | 11.1 | 11.7 |
Solar declination and hour angle at −18°
Getting clear of the light
River Falls is small enough that its own lights are a minor problem — the centre reads Bortle 5. Walking to the edge of town is often escape enough.
- 16 km south-east — around Town of Trimbelle → Bortle 5
- 50 km south-east — around Town of Stockholm → Bortle 4
Falchi 2016 World Atlas (DOI: 10.5880/GFZ.1.4.2016.001)
The months that actually deliver
Counting only nights that were both stormy enough and dark enough, May, September and August came out ahead in River Falls. That is storm season and darkness overlapping — the equinoxes tend to be geomagnetically active, and the nights are already long by then.
Darkest nights of the coming year
A bright moon washes out a weak display as effectively as street lighting. These new moons fall inside the River Falls viewing season.
- 13 Aug 2026
- 11 Sep 2026
- 11 Oct 2026
- 09 Nov 2026
- 09 Dec 2026
- 07 Jan 2027
- 06 Feb 2027
Where it is close to a certainty
If you would rather plan a trip than wait for a storm, the nearest place with genuinely frequent aurora is Yellowknife, 2,400 km north-north-west in Canada.
| River Falls | Yellowknife | |
|---|---|---|
| Kp needed | 7 | 3 |
| Nights per year | 3.2 | 171.4 |
| Geomagnetic latitude | 53.5° | 68.6° |
Confirmed reports from this area
174 verified sightings were logged within 300 km of River Falls between 2015-01-01 and 2016-12-31. Rare is not the same as impossible.
Aurorasaurus verified positive reports
Where the horizon opens up near River Falls
The display sits low on the northern horizon, so what beats a better forecast is open ground facing that way. Height gets you above the town glow; water gives you an unbroken skyline. These are within a short drive of River Falls.
- Troy Park — park12.2 km north-west
- Twin Lakes — lake12.2 km north-north-east
- Afton State Park — park12.6 km west
- Coons Hill — mountain15.6 km north-west
- Shank Lake — lake16.2 km north
- Bissels Mounds — mountain17.9 km west-north-west
Places from GeoNames (CC BY 4.0)
What to do with the daylight
Aurora watching is a night job, and in winter that leaves a short, bright day to fill. Close to River Falls you will find WEVR-AM (River Falls), WEVR-FM (River Falls) and WRFW-FM (River Falls), and for a day when the cloud sits low, Afton Historical Museum are indoors and near by.
Keep the daylight loose: the sky decides the evening, and the forecast can turn within a few hours.
Places from GeoNames (CC BY 4.0)
Where to stay
Anywhere on the outskirts of River Falls will do; what matters is being able to step outside and check the sky without a drive first.
- Americas Best Value Inn 0.8 km from the centre
- Super 8 River Falls Wi 1.0 km from the centre
- Econo Lodge River Falls 1.2 km from the centre
- Country Inn Suites River Falls 1.6 km from the centre
- Comfort Suites 13.1 km from the centre
- Comfort Suites Hudson 13.1 km from the centre
Places from GeoNames (CC BY 4.0) — confirm before booking
The last nights it was visible here
Nights in the last decade when the storm was strong enough for River Falls and the sky was dark enough to show it.
| Date | Peak |
|---|---|
| 2026-03-20 | Kp 7.0 |
| 2026-01-20 | Kp 7.67 |
| 2026-01-19 | Kp 8.67 |
| 2025-11-12 | Kp 7.33 |
| 2025-11-11 | Kp 8.67 |
NOAA planetary Kp
Know when it is worth going outside
Revon watches the River Falls forecast and pushes an alert when the odds for tonight clear your threshold — no checking, no guessing.
Common questions about the aurora borealis in River Falls
Can you see the aurora borealis from River Falls?
Yes. On the last 10.0 years of NOAA Kp records, River Falls had about 3.2 nights a year when the storm was strong enough and the sky dark enough at the same time.
What Kp index do you need to see the aurora borealis in River Falls?
Kp 7. River Falls sits at geomagnetic latitude 53.5°, and the auroral oval only reaches that far from the pole once activity hits Kp 7. Storms that size occur about 3.2 nights a year.
When is the best time of year to see the aurora borealis in River Falls?
May, September and August. Those months scored highest once both conditions are counted together: geomagnetic activity and enough hours of real darkness.
Where can you escape the light pollution near River Falls?
The centre of River Falls reads Bortle 5. The nearest sky at Bortle 4 is about 50 km south-east around Town of Stockholm. On a marginal night that drive matters more than the forecast does.
Where is the nearest place to River Falls with reliable aurora borealis?
Yellowknife, Canada — 2,400 km north-north-west. It needs only Kp 3 and averages 171.4 viable nights a year against 3.2 in River Falls.
Nearby towns
Forecasts for places within reach of River Falls.