This month in Costa Rica
Costa Rica Weather in May
May's climate at Tamarindo, Guanacaste, Costa Rica (Pacific coast) pairs 9.91 inches of rain with 91.4°F days and 78.0°F nights (historical averages). The May 8 to 15 fare from Omaha was $480 on Delta and WestJet, two stops each way through Minneapolis and Toronto. On May 15 the sun is up from 5:22 am to 5:58 pm, 12.6 hours of daylight, and the May time difference from Omaha is 1 hour (behind).
Photo: Ann Lane
High / low
91° / 78°F
Rain
9.9 in
for the month
Humidity
73%
Wind
7 mph
Hurricane season
In season
Fare from OMA
$480
May 8, 2027–May 15, 2027
Verdict
May in Costa Rica: 9.91 in rain, 91.4°F average high; hurricane season, outside peak.
Rule: rain, comfort band and hurricane timing, explained on the method page.
vs last / next month
- vs April: 5°F cooler, 8.4 in wetter, 12 pts more humid
- vs June: 5°F warmer, 0.4 in drier, 10 pts less humid
- May sky: 75.3% cloud, 5.10 kWh/m²/day solar. April: 49.1% / 6.18; June: 82.3% / 4.89 (NASA).
- 2027-05-15: sunrise 05:22, sunset 17:58; 12.60 hours of light, changing 12 minutes across May. April daylight: 12.36 hours; June: 12.72. Omaha clock offset: -1 hours.
- May water: 85.0°F (NOAA 2015–2024). April water: 84.1°F; June: 84.5°F. Dew point: 73.1°F in May, 68.9°F in April, 75.2°F in June (NASA 2001–2025).
- Fares: May's $480 search result is up $134 on April's $346; June then climbs to $656.
NASA POWER 2001–2025 means, Tamarindo, Guanacaste, Costa Rica (Pacific coast).
Holidays & events
- May holidays on the Costa Rica MTSS feriados list: Dia Internacional del Trabajo on May 1. Occupancy for May is not in our data; Ann hears it from the resorts.
Pack for May (rule shown)
- Packable rain jacketrain 9.9 in > 3 in
- Quick-dry shoes, not just sandalsrain 9.9 in > 6 in
- Reef-safe SPF 50 and a sun hathigh 91°F > 88°F
- Travel insurance confirmation and the resort's weather policyinside hurricane season
- Reef-safe sunscreen and a rash guardSolar 5.10 kWh/m2/day in May (line: 5.0). The UV figure NASA gives, 2.10, is a daily mean, so solar energy stands in for the UV 8+ rule.
Flight detail, OMA to LIR
$480
Delta + WestJet, 2 stops via MSP/YYZ, 19h 50m out, self-transfer. 29 itineraries. Observed Oct 31, 2026; not a quote.
Guide, sources and the 12-month table: Costa Rica.
May questions
How does May compare with nearby months in Costa Rica?
Are there public holidays in Costa Rica in May?
Sources: ignav.com · nhc.noaa.gov · escuelajudicialpj.poder-judicial.go.cr · power.larc.nasa.gov · coastwatch.pfeg.noaa.gov · travel.state.gov · travel.state.gov · power.larc.nasa.gov
From Ann
May in Costa Rica, priced for your week.
Considering May in Costa Rica? Share your dates and budget. Ann checks OMA–LIR flights and places to stay against this 9.91 in rain / 91.4°F climate record.
Photo: Ann Lane