May in Sioux Falls, SD: shoulder season for golf — playable with smart tee time selection. Best tee times: mid-morning through early afternoon.
| Average May Weather | |
|---|---|
| Avg daily high | 70°F |
| Avg daily low | 50°F |
| Rainy days | 14 / mo |
| Avg peak wind | 14.5 mph |
May's numbers tell a mixed story on the scorecard. The 70°F average high sits comfortably inside the ideal 60–80°F range, which means iron distances behave predictably and you're not fighting heat-softened fairways or cold-stiff muscles for most of the round. The 20°F daily swing from 50°F lows to 70°F highs does matter, though: morning tee times starting near that low end can cost you a club or two on carry distance until the air warms. The bigger number to respect is precipitation — 14 days with measurable rain makes May the wettest month of the year in Sioux Falls, so wet rough, soft greens, and potential lift-clean-place conditions are real factors. Peak wind at 14.5 mph ranks 6th-calmest of the year, which sounds fine until a 14-mph crosswind is shaping your approach on a narrow par-4.
Net result: good scoring conditions are available in May, but the window inside any given day is narrower than the calendar date suggests.
Book afternoon slots — ideally between noon and 3 PM — to let the temperature climb away from that 50°F morning low, since a 20°F warm-up over the course of the day meaningfully affects ball flight and comfort. With 14 rain days spread across the month, check the 48-hour forecast rather than booking a week out and assuming the morning will clear. See how conditions rate hour by hour on our playability scale.
May's 70°F average high is a full 14°F warmer than April's 56°F, making it significantly more playable in terms of temperature, though it adds one more precipitation day (14 vs. 13) and you'll still need layers for cool morning starts. June pulls ahead by trimming three rain days down to 11 and pushing the high to 83°F, so if dry, warm conditions are the priority, June delivers — but May's nearly identical peak wind (14.5 mph vs. June's 14.1 mph) means the wind gap between the two months is almost negligible.
Climate normals show the long-term picture, but day-to-day weather varies. Check today's live golf weather score for Sioux Falls, SD for the current playability rating, hourly wind, temperature, and the recommended tee time window.
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It's workable but comes with conditions. The average high of 70°F is ideal for scoring, but May is the wettest month of the year with 14 precipitation days, so rain delays and soft course conditions are a legitimate planning factor. Afternoon rounds on clear days offer the best combination of warmth and manageable 14.5 mph peak winds.
Overnight lows average 50°F, which means early morning tee times can feel genuinely cold — especially with the month's average peak wind of 14.5 mph adding a wind-chill effect. The daily temperature swing is 20°F, so conditions improve considerably by midday, and packing a windproof layer for the first few holes is a practical move rather than an overreaction.