How gas prices have changed in Boulder in the last week

Written by:
May 18, 2026
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How gas prices have changed in Boulder in the last week

compiled statistics on gas prices in Boulder-Longmont, CO metro area using data from . Gas prices are current as of May 18.

Boulder by the numbers
- Gas current price: $4.73
--- Colorado average: $4.66
- Week change: +$0.35 (+7.9%)
- Year change: +$1.61 (+51.8%)
- Historical expensive gas price: $4.92 (6/23/22)

- Diesel current price: $5.69
- Week change: +$0.29 (+5.5%)
- Year change: +$2.23 (+64.6%)
- Historical expensive diesel price: $5.69 (5/18/26)

Metros with the least expensive gas
#1. McAllen-Edinburg-Mission, TX: $3.78
#2. Brownsville-Harlingen, TX: $3.79
#3. Laredo, TX: $3.80

Read on to see which metros have the most expensive gas prices.

1 / 5
Rangsarit Chaiyakun // Shutterstock

#5. San Luis Obispo-Atascadero-Paso Robles, CA

- Regular gas price: $6.30
2 / 5
Christian Mueller // Shutterstock

#4. San Rafael, CA

- Regular gas price: $6.31
3 / 5
Istvan Csak // Shutterstock

#3. San Francisco, CA

- Regular gas price: $6.31
4 / 5
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#2. Salinas, CA

- Regular gas price: $6.31
5 / 5
Daniel Avram // Shutterstock

#1. Napa, CA

- Regular gas price: $6.37

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